A company is considering a $168,000 investment in machinery with the following net cash flows. The company requires a 10% return on its investments. (PV of $1, FV of $1, PVA of $1, and FVA of $1) (Use appropriate factor(s) from the tables provided.) Year 1 Year 2 Year 3 Year 4 Year 5 Net Cash Flow $10,000 $29,000 $55,000 $42,000 $113,000 (a) Compute the net present value of this investment. (b) Should the machinery be purchased?