Okay I have no clue how to do this question, PLEASE HELP !

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

part a) what is the IRR for Project A?

part b) what is the IRR project b ?

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

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

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

Please show step by step work thank you !!!