Show the calculation in excel with formula please step by step

1. If the capital cost of the project is HIGHER by 20%, what is the CHANGE in IRR for the project? a. 3.7% b. 7.9% c. 6.7% d. 12.4% 2. If the Revenue in each project year is 20% LESS than the base case, then the CHANGE in IRR for the project is: a. -20.3 b. -8.1 c. -14.2 d. -26.4 3. If the operating cost is 20% HIGHER in each project year, what is the CHANGE in the IRR for the project? a. -3.8 b. -6.7 c. -9.5 d. -12.4