please answer both as detailed and clear as possible! Grade 11 Math- Compound and Simple Interest

1. If Carter invests $5300 at 7.2%/a and earned $1200 in interest. If this was a simple interest investment, how long did Carter invest her money? 2. Winnie needs a new washer and dryer and he finds one for $2112. He puts $500 up front but needs to take out a loan for the remaining amount. After a year and a half, he has paid off the loan that totaled to $1879. What was the annual interest rate that Winnie was being charged if it was compound semi-annually