Please help !!!

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 and (b) what is the present worth of the profit at an interest rate of 8% per year? Tacozza Electric, which manufactures brush dc servomotors, budgeted $75,000 per year to pay for certain components over the next 5 years. If the expects to spend $15,000 in year 1, how much of a uniform (arithmetic) increase each year is the company expecting in the cost of this part? Assume the company uses an interest rate of 10% per year