After lifting weights, Juan likes to replenish his energy. His choices are power bars or protein shakes. Juan gets the same amount of happiness from eating 2 power bars as he does from drinking 1 protein shake, regardless of how many power bars or protein shakes he has already eaten that month. a. If Juan has $120 to spend a month on his post-workout consumption, and a protein bar costs $3 and a protein shake costs $5, what is his utility maximizing quantity of power bars and protein shakes? b. Draw a graph explaining this decision and label it completely.