1. After 3 years, a bank has paid $ 1200 as interest to a person for depositing a fixed term. The interest rate has been 4% per year. What was the initial capital with which the deposit was made?

2. An engineer saves $ 150 at the end of each month for a period of 3 years and is recognized 1% per month in the bank. What is the total amount?

3. Juan requests a loan of 7500 in a period of 5 years, how much does he pay monthly if the bank charges him 1.5% per month