Peter's utility function is u(x, y) = x + 2y where x is the number of ounces of coffee and y is the quantity of sugar in grams. Let unit prices be given by P_{x} = 6 cents, P_{y} = 2 cents, and assume that Peter has $9 to spend on coffee and sugar. Find Peter's best choice, in terms of quantities of coffee and sugar. Illustrate it graphically.