Katie needed to take out three loans. a) First, she paid $596.24 in interest on a nine-month loan for which the rate was 11%. How much money did she borrow? b) A year later, Katie borrowed $10,000 for three months. If she paid $225 in interest, what rate of interest did she pay? c) Finally, Katie borrowed $12,000 at 10% interest. If she paid $600 in interest, for how long was the loan