USE R!! PLEASE SHOW CODE AND OUTPUT. USE R!

USE R!! PLEASE SHOW CODE AND OUTPUT. USE R!

3. Suppose the grading policy is: Homework 20%, Exam 1, 30%, Final 50%. Create a new variable, TotalP, the total percentage, which is obtained by TotalP = (Hwl+Hw2+Hw3+Hw4)*20/40+Exam1*0.3+Final*0.5. Produce this new variable. Have a check for the data file, now, you should have this new variable. 4. Suppose our grading policy is: >= 90, A, 80-89, B, 70-79, C, 60-69, D, = 90, A, 80-89, B, 70-79, C, 60-69, D,