Use a formula or a financial calculator to get the answers and please show the steps

Question 30 1 points Sam is considering a project that will produce cash inflows of $2,100 a year for 4 years. The project has a 12 percent required rate of return and an initial cost of $5,000. What is the discounted payback period 3.11 years never 438 years 3.26 years 2.97 years Question 31 You are analyzing the following two mutually exclusive projects and have developed the following information. What is the crossover rate? Project A Project B Year Cash Flow Cash Flow 0 -$75,000 -$75,000 1 $24,800 $22,000 2 $29,500 $27,500 $45,300 551,300 14.96 percent 13.17 percent 14.32 percent 13.33 percent 15.20 percent