1) Isaac borrowed $7000 at 15.5% compounded quarterly 4.5 years ago. One year ago he made a payment of $1800. What amount will extinguish the loan today? (Do not round intermediate calculations and round your final answer to 2 decimal places.)
2) A $4500 loan at 15.25% compounded monthly is to be repaid by three equal payments due 2, 8, and 10 months after the date of the loan. Calculate the size of each payment. (Do not round intermediate calculations and round your final answer to 2 decimal places.)
3) What single payment six months from now would be economically equivalent to payments of $650 due (but not paid) four months ago, and $950 due in 12 months? Assume money can earn 3.7% compounded monthly. (Round your intermediate calculations and final answer to the nearest cent.)