NPV over Range of Potential Discount Rates: You are to determine a range of discount rates, over which the NPV (net present value) is positive. As mentioned above, we dont have a specific discount rate to use. So, in your spreadsheet, you will build a formula calculating the NPV (net present value) and you will calculate this result over a range of discount rates it doesnt need to be fancy just trial-and-error (for example, use a table in Excel). Implement them in your excel.

(Produce a downloadable excel file or please explain the format and formulas)