(2) James gets utility only from his caffeine intake. He can consume good Y or good X, and good Y contains twice as much caffeine as good X. (2%) James has an incon me of M a month. The price of good X is Px per unit, and the price of good Y is Py per unit. What is James' budget line? (2%) What is the optimal choice of James for good Y and good X? (4%)