Q1. Total utility is maximized when marginal utility becomes (circle tothe right one) zero positive negative

Q2Say whether each of the following situations is an example of altruism or reciprocity. a. Giving a few canned goods to the local food bank for its annual food drive: (circle tothe right one) Altruism Reciprocity . b. Helping a friend move their couch after they helped you study for an upcoming exam: (circle tothe right one) Reciprocity Altruism . c. The biological relationship between cleaner fish and large predators in the ocean, in which cleaner fish keep the predator free from parasites and the predator keeps the cleaner fish safe: (circle tothe right one) Altruism Reciprocity .

Q3. Maria has a $500 gift certificate at a spa that she can use on massages or manicures. A massage costs $100, and a manicure costs $50. a. Write the equation for Maria's budget constraint. Let x = massages. Let y = manicures.

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