1. An engineering firm is considering three different computers with the following cash flow over a six year period. If the ?Do Nothing? option is not available, which computer should be selected based on the incremental rate of return if (1) MARR-20% (2) MARR: 10%2 (BA) (Use Arrow Diagram to solve this problem) Computer First Cost (S) Annual Income (S) 24,000 18,500 22,000 5,326 3,800 4,800