Excel Online file below. Open the spreadsheet and perform the required analysis to answer the questions below. Open spreadsheet Plan A:$ million Plan B: $ million Calculate each project's IRR. Round your answer to two decimal places. Plan A: % Plan B: % b. By graphing the NPV profiles for Plan A and Plan B, approximate the crossover rate to the nearest percent. 10 c. Calculate the crossover rate where the two projects' NPVs are equal. Round your answer to two decimal places. %