9. Ruben bought a boat valued at $16,500 on the installment plan requiring a $2000 down payment and equal monthly payments for five years. If the first payment is due one month after the date of purchase and interest is 7.5% compounded monthly, what is the size of the monthly payment? 10. Watson Properties bought a rental property valued at $50,000 by paying 20% down and mortgaging the balance over 25 years through equal payments at the end of each quarter with interest at 10% compounded quarterly. What was the size of the quarterly payments