Need cash flow diagram and equivalence formulas for this question.

(10 pts) You want to by a boat now, and can afford payments of $360 per month for five years. The monthly interest rate is 0.5%, (compounded monthly). (a) What is the maximum you can spend on the boat if there is no down payment? (b) What is the maximum you can spend on the boat if you also have $5000 for a down payment of at the time of purchase