Suppose the composition of marks in one of your courses is as follows Internet Games: 20 %, Weekly Quizzes: 23%, Midterm Exam: 17%, Final Exam: 40%. Suppose at the end of the semester, your grades are as follows Internet Games: 86, Weekly Quizzes: 89, Midterm Exam: 76, Final Exam: 79.

1. Compute your overall average grade at the end of the semester. The potential answers are:

A: 88.22

B: 84.68

C: 82.19

D: 72.44

E: 77.14

2. Suppose you have not yet taken the final exam. We have been asked to report your current letter grade in the scale of A, A-, B+, B, B-, C+, C, C-, D+, D, D-, or F. Compute your numerical average grade before taking the final on the scale of 1 to 100. This numerical grade will be used to identify your letter grade. Transform your before-final numerical grade into the letter grade based on the following rule: Less than 60: F, less than 63: D-, less than 67: D, less than 70: D+, less than 73: C-, less than 77: C, less than 80: C+, less than 82: B-, less than 86: B, less than 88: B+, less than 92: A-, otherwise A. The potential answers are:

A: A

B: B+

C: A-

D: C+

E: B

3. Suppose you have not taken the final exam yet. What grade do you need in the final exam to secure a B as your overall grade in the course?Enter your numerical answer rounded up with no decimal point.