What does Michel's experience imply about the idea of computing levels of utility derived from consumption and contrasting these utilities across individuals? Explain.

Consider Figure 20-1. If this individual were to contemplate consuming a seventh digital app and experience a total utility of 15 utils as a consequence, what would be the resulting marginal utility? Would the points on the total utility and marginal utility graphs in panels (a) and (b) lie higher or lower to the right of the current endpoints of those graphs?

At a consumer optimum, for all goods purchased, marginal utility per dollar spent is equalized. A high school student is deciding between attending Western State University and Eastern State University. The student cannot attend both universities simultancously. Both are fine universities, but the reputation of Western is slightly higher, as is the tuition. Use the rule of consumer optimum to explain how the student will go about deciding which university to attend.

Where possible, complete the missing cells in the table below.

In Problem $20-12$, if the consumer's income rises to $S190$ per week, what new quantities characterize the new consumer optimum?

Suppose that at a higher satisfaction level than in Problem F-3, Sue's constant-utility preferences are as shown in the table below. Calculate the slope of Sue's new budget constraint using the information peovided in Problem F-5. Supposing now that the price of a soft drink falls to $\$1$, find the combination of goods that satisfies Sue's utility-maximization problem in light of her budget constraint.