Drawing indifference curves:

Carl likes taking the rides at Disneyland, but dislikes standing in line to go on the rides.

1. Draw a graph where (i) the X axis is the number of rides taken during one day at Disneyland, and (ii) the Y axis is the number of minutes waiting in line during that day at Disneyland.
2. Draw three of Carl's likely indifference curves. Label and number each one.
3. Write Carl's likely utility function for items X and Y. Total utility = U = f(X, Y) = ?