Both a and b are correct. I was wondering if you could help me solve c.

new computer system will require an Initlal outlay of $21,500, but It will Increase the firm's cash flows by $4,600 a year for each of he next 8 years. a. Calculate the NPV and decide If the system is worth Installing if the required rate of return Is 9%. Note: Negatlve amount should be Indlcated by a minus sign. Do not round Intermedlate calculatlons. Round your answers to 2 decimal places. b. Calculate the NPV and decide If the system is worth Installing if the required rate of return Is 14%. Note: Negatlve amount should be Indlcated by a minus sign. Do not round Intermedlate calculatlons. Round your answers to 2 decimal places. c. How high can the discount rate be before you would reject the project? Note: Do not round Intermedlate calculations. Enter your answer as a percent rounded to 2 decimal places