Professor Z Needs to Allocate Time Among Several Tasks Next

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:
$$\begin{array} { | c | c | } \hline \text { Week } & { \text { \# of students } } \\\hline 6 \text { weeks ago } & 85 \\\hline 5 \text { weeks ago } & 110 \\\hline 4 \text { weeks ago } & 95 \\\hline 3 \text { weeks ago } & 80 \\\hline 2 \text { weeks ago } & 65 \\\hline \text { Last week } & 50 \\\hline\end{array}$$
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