6. (20 Marks) Mark is in charge of resource development and investment in his firm, and he was recently presented with 5 different 6-year investment projects as shown below. Mark's determine that it is not in his firm's best interest to invest in any project that will earn less than 11%. He is also given the go ahead by the board of governors for the firm to choose any and all projects that he finds acceptable, so he does not have to choose only 1 project. Calculate the IRR for each of the projects presented below using an excel spreadsheet graph of present worth vs rate of return. Attach the graph for each project and indicate which projects should Mark invest in, and which projects has to stay away from. Project A B C D E Initial Cost $2,000 $3,500 $7,000 $1,500 $10,000 Annual Revenue $600 $1,000 $2,000 $700 $3,200 Annual $100 $300 $500 $400 $700 Maintenance Salvage Value $200 SO $700 $200 SO