5. Payback period and Internal rate of return. Calculate the payback period for the project from the following cash flows. Indicate fractions a. of a year, for example, 5.72 years. decimal places (such as 10.33%). Attached the spreadsheet to your exam. Original b. Using a spreadsheet application such as Excel, calculate the internal rate of return to2 Interest Investment | Year 1 | Year 2 | Year 3 Year 4 rate 35,000 | 5A (78,000) 15,000 20,000 25,000 8% 5A What are the advantages and disadvantages of using the internal rate of return? Advantages: c. Disadvantages