Jo spends all her money on records. She only considers buying disco and classic rock, and she is always willing to give up two classic rock for one disco record.

a. Create a utility function describing Jo’s preferences.

b. Sketch an indifference curve showing bundle giving her the same utility as when she has 4 disco and 4 classic rock records.

c. A disco record costs $25 and a rock record $10. If Jo has $140 how what is her optimal bundle? As always, show you work/explain your reasoning.

d. Add Jo’s budget line to your graph in part b.