Consider the market for chocolate. The market supply curve is given by Q = 2P. Let Karen's demand curve for chocolate be Q = 3 - P and Brian's demand curve is Q = 6 - P. Suppose Karen and Brian are the only consumers of chocolate in this market.

1. Graph Karen's demand curve and Brian's demand curve on separate graphs. Graph the market supply curve on each of the separate graphs.
2. Now on a new graph, graph the market demand curve for chocolate by horizontally summing Karen and Brian's demand curves.
3. According to question (b), what is the market demand function for chocolate? (Hint: your market demand curve will be composed to two linear segments and therefore you will have two demand curves in your answer. You will need to specify the relevant quantity or price ranges for these two demand curves.) What is the equilibrium price and quantity in the market for chocolate?
4. Now assume the market supply curve for chocolate shifts to the right by 2 units at every price. Write the equation for the new supply curve for chocolate and then find the new equilibrium price and quantity in the market for chocolate.