help please asap! show work please A&B

A. You save $50 from your salary every month and deposit into your savings account. The first payment will be made at the end of the current month. How much money in total you can withdraw from your account in three year? The applicable interest rate is 7%. B. You need $5,000 five years from now. How much money you need to save every six months so that you can have $5,000 in your hand five years from now? Appropriate interest rate is 6%