please explain how to get the npv. I'm confused and the Roi.

Dwight Donovan, the president of Stuart Enterprises, is considering two investment opportunities. Because of limited resources, he will be able to invest in only one of them. Project A is to purchase a machine that will enable factory automation; the machine is expected to have a useful life of four years and no salvage value. Project B supports a training program that will improve the skills of employees operating the current equipment. Initial cash expenditures for Project A are $111,000 and for Project B are $49,000. The annual expected cash inflows are $42,878 for Project A and $15,458 for Project B. Both investments are expected to provide cash flow benefits for the next four years. Stuart Enterprises' desired rate of return is 8 percent. (PV of $1 and PVA of $1) (Use appropriate factor(s) from the tables provided.) Required a. Compute the net present value of each project. Which project should be adopted based on the net present value approach? b. Compute the approximate internal rate of return of each project. Which one should be adopted based on the internal rate of return approach