I am confused about how to complete #3,4 & 5.

Ch Play From Top Stop Year Projected cash in-flows ($) 120,000 90,000 75,000 A W N 50,000 20,000 5. For the two projects here and using a discount rate of 12 percent, decide which one should receive the investment funds. Year Projected cash flows 1 ($) Projected cash flows 2 ($) Cost - $325,000 - $285,000 138,000 112,000 2 225,000 188,000 3 240,000 154,000 4 55,000 86,000 6. Using a discount rate of 6 percent, determine the NPV, the payback time, and the IRR. Year Projected cash flows ($) Cost - $405,000 174,000 99+