Consider the following investment projects: net cash flow B DE 0-$150 -$180 -$50 -$280 -$80 1 $60 $70 $20 $220 -$100 2 $900 $70 $10 $40 - $50 3 $40 $5 $40 $0 4 $40 - $180 -$20 $150 5 $60 $40 $150 6 $50 $30 $100 7 $40 $100 8 $30 9 $20 10 $10 to. a. Classify each project as simple or not simple. b. Obtain the rates of return for each project by graphing the NPV as a function of the interest rate. C. Calculate IRR with the Excel function for those projects classified as simple. Consider the following investment projects: net cash flow B DE 0-$150 -$180 -$50 -$280 -$80 1 $60 $70 $20 $220 -$100 2 $900 $70 $10 $40 - $50 3 $40 $5 $40 $0 4 $40 - $180 -$20 $150 5 $60 $40 $150 6 $50 $30 $100 7 $40 $100 8 $30 9 $20 10 $10 to. a. Classify each project as simple or not simple. b. Obtain the rates of return for each project by graphing the NPV as a function of the interest rate. C. Calculate IRR with the Excel function for those projects classified as simple