Suppose we have a Demand curve for pizza. Beer is a complement for pizza. If beer gets more expensive next year, how do we model the impact on the Demand curve for pizza? Question 15 options: Shifting the Demand curve for pizza to the left Sliding down and to the right along an existing demand curve, but we don't shift the demand curve for pizza. Shifting the Demand curve for pizza to the right Sliding up and to the left along an existing demand curve, but we don't shift the demand curve for pizza