True or false 1. An increase in price will cause the demand curve to shift down and to the left. 2. If peanut butter and jelly are complements, then an decrease in the price of peanut butter will lead to an increase in the demand for jelly . 3. If pizza and beer are complements, then an increase in the price of pizza will lead to an increase in the demand for beer. 4. If coffee and teas are substitutes, an increase in the pride of coffee will lead to an increase in the demand for tea. 5.the supply curve reflects the marginal cost of producing a particular quantity of a good