For the following questions, work on them in ONE Excel file, save and submit the Excel file (if you save it as pdf file, ok to submit the pdf file instead of the Excel file). 1. Based on the following information, use Excel functions in Excel spreadsheet to calculate a. the net present value, assuming the annual discount rate is 10%; b. find the internal rate of return. 2. Based on the following information, use Excel functions in Excel spreadsheet to calculate a. the net present value, assuming the annual discount rate is 12%; b. find the internal rate of return