Please help to solve these and show work so I can understand how to solve them.

1. You borrow $93,000 and promise to pay back $326,566 at the end of 8 years.

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2. You borrow $8,000 and promise to make payments of $2,219.30 at the end of each year for 5 years.

3. you borrow $345,000; the annual loan payments are $49,266.96 for 30 years. What interest rate are you being charged