Excel Online Structured Activity: NPV profiles 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. % c. Calculate the crossover rate where the two projects' NPVs are equal. Round your answer to two decimal places. %