At another university, the marks are converted into letter grades using the following conversions.

A1: 90–100

A: 85–89.9

A2: 80–84.9

B1: 77–79.9

B: 73–76.9

B2: 70–72.9

C1: 67–69.9

C: 63–66.9

C2: 60–62.9

D1: 57–59.9

D: 53–56.9

D2: 50–52.9

F: Less than 50

The marks of two students are listed below. For each, calculate the average mark and the grade point average using a 13-point scale where A+ = 12, A = 11, and so on until F = 0.

Student M: 90, 82, 82, 73, 71, 70, 67, 61, 53, 51

Student N: 98, 84, 84, 76, 72, 72, 69, 62, 56, 52

Describe what you have determined.