I need the answer for part (b). NOT part (a). Thank you

Novak Company manufactures automobile components for the worldwide market. The company has three large production facilities in Virginia, New Jersey, and California, which have been operating for many years. Brett Harker, vice president of production, believes it is time to upgrade operations by implementing computer-integrated manufacturing (CIM) at one of the plants. Brett has asked corporate controller Connie Carson to gather information about the costs and benefits of implementing CIM. Carson has gathered the following data: Initial equipment cost $ 7,500,000 $ 600,000 Working capital required at start-up Salvage value of existing equipment Annual operating cost savings $ 93,750 $ 1,050,000 Salvage value of new equipment at end of its useful life $ 250,000 Working capital released at end of its useful life 600,000 Useful life of equipment 10 years Novak Company uses a 12% discount rate. (a) Your answer is correct. Calculate the net present value of Novak's proposed investment in CIM. (For calculation purposes, use 4 decimal places as displayed in the factor table provided and round final answer to 0 decimal place, e.g. 58,971. Enter negative amounts using a negative sign preceding the number, e.g. -59,991 or parentheses, e.g. (59,991).) Net present value $ -1799840 e Textbook and Media Attempts: 1 of 3 used (b) Your answer is incorrect. Use Excel or a similar spreadsheet application to calculate the internal rate of return on Novak's proposed investment. (Round internal rate of return to 2 decimal places, e.g. 15.25%.) Internal rate of return %