Please solve it

Five projects form the mutually exclusive, collectively exhaustive set under consideration. The cash flow profiles for the five projects are given in the table below. Initial Investment _ 600000 800000 470000 540000 Salvage Value _ 30754 130000 65000 200000 __ 400000 600000 260000 320000 Annual Expenses _ 130000 270000 35445 120000 Set MARR=11%,and refinance rate =14%. a)Based on an internal rate of return analysis, which alternative (if any) should be implemented? b)Plot cumulative cash flow series and interpret the Norstrom'scriterion. c)Based on an external rate of return analysis, which alternative (if any) should be implemented? dJBased on a modified internal rate of return analysis, which alternative {if any) should be implemented