You like pizza and you like cola. Which of the graphs in the figure below represents your happiness as a function of how many pizzas and how much cola you have if

(a) There is such a thing as too many pizzas and too much cola?   figure

(b) There is such a thing as too much cola but no such thing as too many pizzas?   figure

1.graph with x-axis labeled p, y-axis labeled c, and z-axis labeled h, showing a hill with maximum in the positive p-c quadrant.2.graph with x-axis labeled p, y-axis labeled c, and z-axis labeled h, showing a growing maximum parallel to the c-axis, so that cross-sections with c constant have a maximum value at a given value of p and for larger values of c values along the curve are higher.3.graph with x-axis labeled p, y-axis labeled c, and z-axis labeled h, showing a growing maximum parallel to the p-axis, so that cross-sections with p constant have a maximum value at a given value of c and for larger values of p values along the curve are higher.4.graph with x-axis labeled p, y-axis labeled c, and z-axis labeled h, showing a surface that increases as c and p increase.

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