Calculate the present value of the following annuity streams: a. $8,000 received each year for 6 years on the last day of each year if your investments pay 7 percent compounded annually. (Do not round intermediate calculations. Round your answer to 2 decimal places. (e.g., 32.16)) Present value $ b. $8,000 received each quarter for 6 years on the last day of each quarter if your investments pay 7 percent compounded quarterly. (Do not round intermediate calculations. Round your answer to 2 decimal places. (e.g., 32.16)) Present value $ c. $8,000 received each year for 6 years on the first day of each year if your investments pay 7 percent compounded annually. (Do not round intermediate calculations. Round your answer to 2 decimal places. (e.g., 32.16)) Present value $ d. $8,000 received each quarter for 6 years on the first day of each quarter if your investments pay 7 percent compounded quarterly. (Do not round intermediate calculations. Round your answer to 2 decimal places. (e.g., 32.16))