9. Consider the following investment projects: Item Current Practice Just-in-Time System Stockless Supply Start-up cost $0 $2.5 $5 Annual stock-holding cost $3 $1.4 S0.2 Annual operating cost $2 $1.5 $1.2 System life 8 years 8 years 8 years Assume that MARR = 15%. (a) Compute the IRR for each project. (b) If the three projects are mutually exclusive investments, which project should be selected according to the IRR criterion