Aaron purchased a machine for $21,000 for her company. She paid 5.00% of this amount as a down payment and financed the rest at 7.92% compounded quarterly. She paid $1,125 at the end of every quarter to settle the loan.

a. What was the principal portion of payment number 4? $0.00 Round to the nearest cent

b. What was the interest portion of payment number 4? $0.00 Round to the nearest cent