C needs to be answered show all work please!

If the interest rate is 9%, what is the value of the following three investments? a. An investment that offers you $240 a year in perpetuity with the payment at the end of each year. (Round your answer to 2 decimal places.) Present value $ 2666.67 b. A similar investment with the payment at the beginning of each year. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Present value $ 2906.67 c. A similar investment with the payment spread evenly over each year. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Present value C