I would like help with the attached homework, including equations and how we come to the answers

Finance Questions - Sept 21 Assume you are given these mutually exclusive investments with the expected net cash flows as in the table: Year Project A Project B 0 -400.00 -670 1 -528.00 210 2 -219.00 210 3 -250.00 210 4 1100.00 210 5 820.00 210 6 990.00 210 7 -325.00 210 Respond to the questions: Question 1: What is each project's IRR? If each project's cost of capital were 10%, which project, if either, should be selected? If the cost of capital were 17%, what would be the proper choice? Question 2: What is each project's MIRR at the cost of capital of 10%? At 17%? (Hint: Consider Period 7 as the end of Project B's life.) Question 3: What is the crossover rate, and what is its significance