A new computer system will require an initial outlay of $18,000, but it will increase the firm's cash flows by $3,700 a year for each of the next 7 years. a. Calculate the NPV and decide if the system is worth installing if the required rate of return is 10%. (Negative amount should be indicated by a minus sign. Do not round intermediate calculations. Round your answers to 2 decimal places.) Net present value Worth installing b. Calculate the NPV and decide if the system is worth installing if the required rate of return is 15%. (Negative amount should be indicated by a minus sign. Do not round intermediate calculations. Round your answers to 2 decimal places.) Net present value Worth installing