Build me a React application

Hey there, I am looking to make a small test project - How much time do you think you would need? it would be in NextJS-react and mui? Here are the details - his is a simple app for users to test and improve their typing skills. The app will present the user with a random text paragraph or the user can c/p his own choice of the paragraph. Then the user will select the time duration of the test it can be 1 m, 2m 5m, or custom. Once the test is set up he can start the test and hence the timer. The user needs to type the paragraph in another text box as it is. For each correct word, he will get 1 point for each incorrect word he types he will receive 0 points. Total points will be the total no of words in the paragraph. At the end of the test, the user will be presented with his score which is his typing accuracy and speed. Requirements We are not going to provide you with mocks, you should use your own imagination and take care of the usability We will evaluate your submission based on the following criteria Is it feature complete Is it user friendly How well you break your code into components How you test your code Is your implementation extendable if a new feature requirement comes