The dean of a school of business is forecasting total student enrolment for this year's summer session classes based on the following historical data:

YEAR TOTAL ENROLMENT

Four years ago $2,000$

Three years ago $2,200$

Two years ago $2,800$

Last year $3,000$

a$)$ What is this year's forecast using a three$-$year Simple $($Unweighted$)$ Moving Average?

b$)$ What is this year's forecast using Naive Forecasting $?($Always look for trends in the data first$).$