Please explain more detail and list your formula. Thanks

1. Sue started a retirement savings plan. At the end of each year, for 25 years, Sue deposited $4,000 to her savings plan. If the retirement savings plan earns 4 percent, compounded annually, what will her account balance equal after Sue makes the last of her 25 annual savings deposits?

2. Tom was injured by a vehicle driven by a Rapid Transit delivery driver. To settle the claim for Tom's injuries, Rapid Transit agreed to pay Tom ten annual payments of $20,000 with the first of these payments three years from today. Assuming a 4 percent annual interest rate, what is the present value of Tom's settlement?