Profits from recycling paper, cardboard, aluminum, and glass at a liberal arts college have increased at a

Question:

Profits from recycling paper, cardboard, aluminum, and glass at a liberal arts college have increased at a constant rate of $1100 in each of the last 3 years. If this year's profit (end of year 1) is expected to be $6000 and the profit trend continues through year 5
(a) What will the profit be at the end of year 5?
(b) What is the present worth of the profit at an interest rate of 8% per year?