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How long will it take $100 to double if it earns the following rates? Compounding occurs once a year. Round your answers to two decimal places. a. 8%. year(s) b. 11% year(s) c. 16% year(s) d. 100% year(s) Find the present values of these ordinary annuities. Discounting occurs once a year. Do not round intermediate calculations. Round your answers to the nearest cent. a. $500 per year for 16 years at 6%. $ I b. $250 per year for 8 years at 3% $ c. $500 per year for 8 years at 0%. $ d. Rework previous parts assuming they are annuities due. Present value of $500 per year for 16 years at 6%:$ Present value of $250 per year for 8 years at 3%:$ Present value of $500 per year for 8 years at 0%:$ Find the future values of these ordinary annuities. Compounding occurs once a year. Do not round intermediate calculations. Round your answers to the nearest Kent. a. $500 per year for 10 years at 12% $ b. $250 per year for 5 years at 6%. c. $900 per year for 5 years at 0% $ d. Rework parts a, b, and c assuming they are annuities due. Future value of $500 per year for 10 years at 12%: $ Future value of $250 per year for 5 years at 6%: 5 Future value of $900 per year for 5 years at 0%:$