A man is planning to retire in 20 years. He can deposit money for his retirement at 12% interest rate compounded monthly. It is estimated that the future general inflation (f) rate will be 4% compounded annually. What deposit must be made each month until the man retires (i.e., end of year 20 from now) so that he can make annual withdrawals of $20,000 in terms of today's dollars over the 15 years following his retirement? Assume that his first withdrawal occurs at the end of the first six months after his retirement.?