Professor Z Needs to Allocate Time Among Several Tasks Next

Multiple Choice

Professor Z needs to allocate time among several tasks next week to include time for students' appointments.Thus,he needs to forecast the number of students who will seek appointments.He has gathered the following data:
Week # of students
6 weeks ago 83
5 weeks ago 110
4 weeks ago 95
3 weeks ago 80
2 weeks ago 65
Last week 50
-What is the forecast for this year using a moving-average forecast based on the last three weeks?

A) 49
B) 50
C) 52
D) 65
E) 78