I want the answers with steps please:

1- Consider the following projects, X and Y where the firm can only choose one. Project X costs $600 and has cash flows of $400 in each of the next 2 years. Project Y also costs $600, and generates cash flows of $500 and $275 for the next 2 years, respectively. Which investment should the firm choose if the cost of capital is 25 percent?

2. What is the IRR for the following project if its initial after-tax cost is $5,000,000 and it is expected to provide after-tax operating cash flows of ($1,800,000) in year 1, $2,900,000 in year 2, $2,700,000 in year 3, and $2,300,000 in year 4?

3. What is the NPV for a project whose cost of capital is 15 percent and initial after-tax cost is $5,000,000 and is expected to provide after-tax operating cash inflows of $1,800,000 in year 1, $1,900,000 in year 2, $1,700,000 in year 3, and $1,300,000 in year 4?