Question 1 (20 points) For the cash flow series below, calculate the external rate of return, using the return on invested capital approach with a reinvestment rate of 12% per year, and determine whether this project is justified with MARR of 8% per year Year Cash Flow ($) 0 +6,000 1 -5,000 2 +4.000 3 -9,000 4 +2,500 o 6 - 2 9