Assume that we examine the utility an individual derives from the consumption of McDonald's or Wendy's. McDonald'sis on the horizontal axis, and Wendys are on the vertical axis. For each of the cases below, show the possible shape of these indifference curves, and fully explain whether any of the properties for an indifference curve are violated.

a. McDonald's provide disutility to an individual.

b. An individual is neutral about Mcdonald's, in that she doesn't care if she consumes them or not.