please respond to both, if using excel let me see the formulas

Tropical Candy Inc are considering two mutually-exclusive projects, A and B. Their cash flows are shown below. Both Project A and Project B have an estimated cost of capital of 10%. Cash flows will be realized at the end of each time period. Year, t Project A Cash Flow at time t Project B Cash Flow at time t 0 -1800 -600 1 110 660 2 263.78 72.6 3 133.1 53.24 4 1024.87 146.41 5 3221.02 1610.51 a) Calculate the NPV for each project. Which, if either, project should be accepted? Why? b) Are there other capital budgeting criteria? If yes, list at least one