Need HELP!! ASAP!!

A project that requires an initial investment of $120,000 is expected to have an after-tax cash flow of $20,000 per year for the first two years, $40,000 per year for the next two years, and $50,000 for the fifth year?

a. What is the NPV of the project using a discount rate of 10%?

b. What is the IRR of the project?

c. What decision would you make regarding this project if the required rate of return is 10%?

d. What is the equivalent annual annuity using a 10% required rate of return?