Your mom is 50 and wants to put away some $ for retirement. She would like to make monthly deposits in the bank, starting today and at the beginning of every month between now and the month before her retirement at age 70. a) of the interest rate is 6% per year (.5% per month), how much should she save each month in order to have $200,000 on the day she retires? b) Use Data Table to repeat the above calculation for annual rate of 0%, 1%, ..., 12%