please, solve for beginner python 3 level

Question I (40 pts): Write a GUI application that keep track students. test grades and calculate the average marks. A sample of GUI is shown below. At the beginning, the user selects either "Numeric" or "Lefter" grading. The user enters Test I, Test 2., and Test 3 scores of a student. The name of the student, the entered seores and the average of scores are inserted into the text box field as shown the figure. At cach entry, the class average is also updated. If you select "Numeric", then grades (maximum grade is 100 points) are calculated as secn in the figure given above. If "Letter" is selected, then Medipol grading table is used for calculating grades. The Medipol grading table is given below: In letter grading, each test score is entered as a letter. Each letter grade is converted to a numenic grade using an upper numeric-grade (A=>,A>3,76,,C=>2,47) given in Medipol grading table, Student and class averages are calculated out of 4 . An example is given below