Please break down the solution/formulas used

A company is analyzing two mutually exclusive projects, S and L, whose cash flows 2 are shown below: 4 Years S 5 S 6 L o -1242 -1093 1 9 81 1411 2 459 453 3 156 33 1 4 79 181 8 The company's cost of capital is 11.9 percent, and it can obtain an unlimited amount of 9 capital at that cost. What is the regular IRR (not MIRR) of the better project, that is, o the project that the company should choose if it wants to maximize its stock price