1. Suppose an investment of $1000 now time zero) and receive $350 per year over 4 years (years 1, 2, 3, and 4). At the end of year 4 there will be another income (Salvage value) of $500. Assume annual interest rate is 10%. Conduct a sensitivity analysis by providing sensitivity graph for the cases of -10%, -5%, 0% (base case), +5%, and +10% variation on annual incomes and salvage value. Conclude how sensitive is the investment on variations and under what range of variation the investment is justified