when you calculate the IRR please show me how its done with just a calculator not excel

12. Warr Company is considering a project that has the following cash flow data. What is the project's IRR? Note that a project's projected IRR can be less than the WACC or negative, in both cases it will be rejected. Year 2 3 -$1,420 $400 $400 $400 $400 0 Cash flows a. 3.96% b. 4.21% c. 4.95% d. 5.00% c. 5.99% O