I need help with my Excal

Question 1: Use Sheet2 of the Excel file "ENGR2304_ClassWorkFile1" you downloaded. Due Tuesday 8/31/2021 (a) Refer to Sheet2 of the Excel file you downloaded. You are provided with a Spreadsheet for grades for 30 students. Study and understand the Spreadsheet. Populate columns H, N and T. Using Excel programming compute the total score (100%) and generate the letter grades for each of the students. The total score is computed using the formula below: Total Score = (Exams 1-3 = 40%) + (Homework 25%) + Final (35%) The average of the three quizzes will be used as extra credit and should be added to the total score. All computations should be recorded to one decimal place but the total score should be reported to the nearest whole number. The following letter grades are to be used: A = 90 - 100 B= 80 - 89 C = 70 - 79 D = 60 - 69 F = 60