1. Shirley likes coee and ice cream. She strictly prefers to have 2 cups of coee and 1 ice cream cone to 1 cup of coee and 2 ice cream cones. She is indierent between 3 cups of coee and no ice cream and 1 ice cream cone and no coee. Which utility functions might represent Shirley's preferences for coee (good c) and ice cream (good i)?

2. Assume that a consumer's utility function is u(x1,x2)=6x1x1^214+x2. Find the indierence curve at the utility level = 3.