PYTHON

Problem 4 Design and write a Python program that will from Keyboard read four inputs, named test1, test2, test3, and final. The application will then determine the best 2 (Btest1, and Btest2) out of the 3 grades of tests 1, 2 and 3. Then, it will compute the final average and the letter grade. Use the following grading policy: BTest1: 30% BTest2: 30% Final: 40% And then display the corresponding letter-grade based on the following scheme: 90-100: A 80-89: B 70 79:C 60-69:D 59 and below: F Define and use functions in your implementation. The following shows a sample run. Your application should be able to generate a similar output: Grade Computing Application By your Enter Testi: 90 Enter Test2: 79 Enter Test: 94 Enter Tinal: Computed Average: 87.4 Computer Letter Grade: "B" Thank you. Use functions in your program