You start working at the age of 20 and you plan to deposit $5000 in savings account

Question:

You start working at the age of 20 and you plan to deposit $5000 in savings account every year for next 45 years
a) At the end of this time how much money will you have if the interest rate is 5%
b) You decided that's not enough money how much will you have to save every year if you wish to have $ 1,000,000 when you retire