What is the irr for project a

BRUIN INC., has identified the following two mutually exclusive projects:

year cash flow A cash flow B

0 - $36,900 - $36,900

1 19,260 6,760

2 14,760 13,260

3 12,260 19,760

4 9,260 23,760

Explain how this is solved thank you !

a) What is the IRR for Project A?

b) What is the IRR project b?

c) If the require return is 15 percent, what is the NPV for Project A?

d) If the require return is 15 percent, what is the NPV for Project B?

e) At what discount rate would the company be indifferent between these two projects?

Please show me how this be done carefully!