Please solve using excel and show work for each cells

The government is considering undertaking four projects. These projects are mutually exclusive, and the estimated present worth of their costs and the present worth of their benefits are shown in millions of dollars in the table. All of the projects have the same duration. Assuming no do-nothing alternative, which alternative would you select? Use a benefit-cost (BC(i)) analysis on incremental investment. Complete the steps below using cell references to given data or previous calculations. In some cases, a simple cell reference is all you need. To copy/paste a formula across a row or down a column, an absolute cell reference or a mixed cell reference may be preferred. If a specific Excel function is to be used, the directions will specify the use of that function. Do not type in numerical data into a cell or function. Instead, make a reference to the cell in which the data is found. Make your computations only in the blue cells highlighted below. In all cases, unless otherwise directed, use the earliest appearance of the data in your formulas, usually the Given Data section. BC(i Is the increment justified: should be chosen. 1. Start Excel-completed. 2. In cell E15, by using cell references, calculate the benefit-cost ratio for project A1. (1 pt.) 3. To calculate the benefit-cost ratios for projects A2, A3, A4, copy cell E15 and paste it onto cells E16:E18. (1 pt.) 4. In cells F15:F18, determine which project(s) should be excluded from subsequent consideration. (1 pt.) 5. In cell E21, determine which projects should be considered as the base alternative and the first-choice alternative. (1 pt.) 6. In cell E22, by using cell references, calculate the benefit-cost ratio for the first increment. (1 pt.) 7. In cell E23, determine whether the first increment is justified. (1 pt.) 8. In cell F21, determine which projects should be considered as the current base alternative and the second-choice alternative. (1 pt.) 9. In cell F22, by using cell references, calculate the benefit-cost ratio for the second increment. (1 pt.) 10. In cell F23, determine whether the second increment is justified. (1 pt.) 11. In cell C25, determine which project should be chosen. (1 pt.) 12. Save the workbook. Close the workbook and then exit Excel. Submit the workbook as directed