please show all steps, thank you!

Question 2 (20 marks) (a) You are planning to save for retirement over the next 25 years. To do this, you will invest $7,000 a month in a stock account and $3,000 a month in a bond account. The return on the stock account is expected to be 7.5%, and the bond account will pay 4.5%. When you retire, you will combine your money into an account with a 3% return. How much can you withdraw each month during retirement assuming a 20-year withdrawal period?(14 marks) (b) You have $100,000 that you want to use to open a savings account. There are five banks located in your area. The rates paid by banks A through D, respectively, are given below. Which bank should you select if your goal is to maximize your interest income? (6 marks) Bank A: 3.26%, compounded annually Bank B. 3.20%, compounded monthly Bank C: 3.25%, compounded semi-annually Bank D: 3.22%, compounded quarterly