Answer: 38.77%
Explanation: the IRR is a discount rate that equates the present value of after tax cash flow to the capital amount invested.
Using the financial calculator:
Cash flow for year 0 = -7.99
Cash flow for year 1 = 4.95
Cash flow for year 2= 4.95
Cash flow for year 3= 4.95
IRR = 38.77%
I hope my answer helps.