4. In the Arrow Diagram shown below, option G is the least expensive and option A is the most expensive option. Which option should we pick for 8% (a) MARR = 10% T T 12% (b) MARR=15%? 7% 9% 11% A D 12% 4. In the Arrow Diagram shown below, option G is the least expensive and option A is the most expensive option. Which option should we pick for 8% (a) MARR = 10% T T 12% (b) MARR=15%? 7% 9% 11% A D 12%