my solution

README.md

@@ -18,4 +18,4 @@ The `App` should contain the next `Sum` components:
 - Install Prettier Extention and use this [VSCode settings](https://mate-academy.github.io/fe-program/tools/vscode/settings.json) to enable format on save.
 - Implement a solution following the [React task guideline](https://github.com/mate-academy/react_task-guideline#react-tasks-guideline).
 - Open one more terminal and run tests with `npm test` to ensure your solution is correct.
-- Replace `<your_account>` with your Github username in the [DEMO LINK](https://<your_account>.github.io/react_sum/) and add it to the PR description.
+- Replace `<your_account>` with your Github username in the [DEMO LINK](https://VitaliiHutsalo.github.io/react_sum/) and add it to the PR description.

src/App.jsx

@@ -1,13 +1,14 @@
 import React from 'react';
 import './App.scss';
+import { Sum } from './components/Sum/Sum';
 
 export const App = () => (
   <>
-    <p>Sum of 2 and 3 is 5</p>
-    <p>Sum of -5 and 5 is 0</p>
-    <p>Sum of 10 and 0 is 10</p>
-    <p>Sum of 0 and 5 is 5</p>
-    <p>Sum of 0 and 0 is 0</p>
+    <Sum a={2} b={3} />
+    <Sum a={-5} b={5} />
+    <Sum a={10} />
+    <Sum b={5} />
+    <Sum />
     {/* Replace paragraphs with Sum componets */}
     {/* And remove commented lines :) */}
   </>

src/components/Sum/Sum.jsx

@@ -1 +1,5 @@
-// export const Sum = () => ();
+export const Sum = ({ a = 0, b = 0 }) => (
+  <p>
+    Sum of {a} and {b} is {a + b}
+  </p>
+);