Suppose that Antonio's total utility from different quantities of snacks per day is given by the table below.
a. Draw and label Antonio's utility function for snacks.
b. Fill in the last column of the table above, calculating Antonio's marginal utility from snacks.
c. Does Antonio always display diminishing marginal utility in his satisfaction from snacks?
d. Assuming Antonio is rational, what is the maximum number of snacks that he could choose to consume per day?