diff --git a/.github/workflows/task1.yaml b/.github/workflows/task1.yaml
new file mode 100644
index 0000000..4815a6f
--- /dev/null
+++ b/.github/workflows/task1.yaml
@@ -0,0 +1,14 @@
+name: task 1 workflow
+on: 
+    push: 
+    # event - https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows
+jobs:
+  example-job:
+    runs-on: ubuntu-latest
+         # system - https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
+    steps:
+      - run: echo "GITHUB REF ${GITHUB_REF}"
+      - run: echo "GITHUB Branch ${GITHUB_REF_NAME}"
+      - run: echo "COMMIT REF ${GITHUB_SHA}"
+      - uses: actions/checkout@v4
+      - run: ls -R
diff --git a/.github/workflows/task2.yaml b/.github/workflows/task2.yaml
new file mode 100644
index 0000000..86f5dc3
--- /dev/null
+++ b/.github/workflows/task2.yaml
@@ -0,0 +1,27 @@
+name: task 2 workflow
+on: 
+    push: 
+    # event - https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows
+jobs:
+  example-job:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./desktop-app
+    
+         # system - https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 'latest'
+          cache: 'npm'
+          cache-dependency-path: desktop-app/package-lock.json
+
+      - run: npm ci
+      - run: npm run build --if-present
+      - run: npm test
+
+      
+      
diff --git a/.github/workflows/task3.yaml b/.github/workflows/task3.yaml
new file mode 100644
index 0000000..cc827e5
--- /dev/null
+++ b/.github/workflows/task3.yaml
@@ -0,0 +1,30 @@
+name: task 3 workflow
+on: 
+    push: 
+      paths: 
+        - desktop-app/**.ts
+    # event - https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows
+jobs:
+  example-job:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./desktop-app
+    
+         # system - https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 'latest'
+          cache: 'npm'
+          cache-dependency-path: desktop-app/package-lock.json
+
+      - run: npm ci
+
+      - run: npm run build --if-present
+      - run: npm test
+
+      
+      
diff --git a/.github/workflows/task4.yaml b/.github/workflows/task4.yaml
new file mode 100644
index 0000000..bdf3bb4
--- /dev/null
+++ b/.github/workflows/task4.yaml
@@ -0,0 +1,37 @@
+name: task 4 workflow
+on: 
+    push: 
+      paths: 
+        - desktop-app/**.ts
+    # event - https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows
+jobs:
+  example-job:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./desktop-app
+    
+         # system - https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 'latest'
+          cache: 'npm'
+          cache-dependency-path: desktop-app/package-lock.json
+
+      - run: npm ci
+
+      - run: npm run build
+      - run: npm test
+      - run: xvfb-run --auto-servernum --server-args="-screen 0 1280x960x24" -- npm run e2e
+      - uses: actions/upload-artifact@v4
+        if: ${{ failure() }}
+        with:
+          name: failed-tests
+          path: |
+            desktop-app/test-results/**
+
+      
+      
diff --git a/desktop-app/src/constants.ts b/desktop-app/src/constants.ts
index d1dbaac..780472b 100644
--- a/desktop-app/src/constants.ts
+++ b/desktop-app/src/constants.ts
@@ -5,4 +5,4 @@ export const AMAZONS = [
   { name: "Włochy", url: "https://www.amazon.it" },
   { name: "Francja", url: "https://www.amazon.fr" },
   { name: "Hiszpania", url: "https://www.amazon.es" },
-];
+]; 
\ No newline at end of file
diff --git a/desktop-app/src/e2e/basic.test.ts b/desktop-app/src/e2e/basic.test.ts
index 8850336..bbc269d 100644
--- a/desktop-app/src/e2e/basic.test.ts
+++ b/desktop-app/src/e2e/basic.test.ts
@@ -8,5 +8,5 @@ electronTest("Window has correct title", async ({
   page
 }) => {
   const title = await page.title();
-  expect(title).toBe("Vite + React + TS");
+  expect(title).toBe("React + TS");
 })
\ No newline at end of file
diff --git a/desktop-app/src/utils/index.ts b/desktop-app/src/utils/index.ts
index e168c95..36dbdf5 100644
--- a/desktop-app/src/utils/index.ts
+++ b/desktop-app/src/utils/index.ts
@@ -1,4 +1,7 @@
 // @ts-ignore
 export function sum(a: number, b: number, c: number | undefined = undefined) {
-  return a + b;
+  if(c)
+    return a+ b +c;
+  else
+    return a + b;
 }