Boeing is considering two mutually exclusive engine design development projects The ABC design has an expected life of 3 years, and the projected cash inflows are $250,000 per year for the 3 years The DEF design has an expected life of 6 years, and the projected cash inflows are $180,000 per year for the 6 years Both projects require an initial investment of $300,000, and Boeing's cost of capital is 9 Which engine design, if any, should Boeing choose to develop