I need help with part c please!

A new computer system will require an initial outlay of $20.250, but it will increase the firm's cash flows by $4,500 a year for each of the next 6 years. a. Calculate the NPV and decide if the system is worth installing if the required rate of return is 8% (Negative amount should be indicated by a minus sign. Do not round intermediate calculations. Round your answers to 2 decimal places.) 552.96 Net present value Worth installing $ Yos b. Calculate the NPV and decide if the system is worth installing if the required rate of return is 13%. (Negative amount should be indicated by a minus sign. Do not round intermediate calculations. Round your answers to 2 decimal places.) Book Prim (2.261.03) Net present value Worth installing $ No erences eBook Print eferences c. How high can the discount rate be before you would reject the project? (Do not round Intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) Maximum discount rate