Solve fast please

1. if to provide for $850,000 dental college education, we are going to deposit at the end of each period for the next 4 years in a bank where it will earn 2.75% interest compounded quarterly. the number of periods is the periodic interest rate is _% 2. you borrow $100,000 and promise to pay back ok installment at $5,000 each end of month. If interest rate were 20%. How long will it take to be paid? _month