I request you to please give a detailed calculation manually.

Consider an investment that will pay you $3,000 per month for each of the next 3years, and then $5,000 per month in the following 5 years.

a) If your required rate of return on this investment is 18 percent per year, what is the most you would be willing to pay for it?

NOTE: Your cash flow worksheet does NOT incorporate the P/Y setting. Thus, you must use periodic interest rates when calculating the NPV with irregular cashflows

b) Suppose you can purchase this investment for $150,000. What is its net present value? Should you purchase this investment?