9. Consider the following cash flow profile and assume MARR=10%/year. End of year 0 1 2 3 4 5 6 Net cash flow -$100 $25 $200 -$100 $250 -$200 -$100 a. Calculate the ERR for this project. b. Is this project economically attractive? 9. Consider the following cash flow profile and assume MARR=10%/year. End of year 0 1 2 3 4 5 6 Net cash flow -$100 $25 $200 -$100 $250 -$200 -$100 a. Calculate the ERR for this project. b. Is this project economically attractive