Please help with 2 and 3

There is a extra think for number 3:determine the total amount of interest accrued in the account over the 8 years of the annuity.

interest how 2. Brad has nothing in his savings account right now but realizes it would be a very good idea to build up a savings balance. His account pays 4% interest. How much should he deposit each month if he wants to have $10,000 in the account in 2 years. 3. Find the quarterly payment needed to accumulate $30,000 in 8 years, assuming an interest rate of 5.17%. T Thin wants to have $800,000 in her retirement account in 40 years, how much should