1. The following diagrams show the initial demand curve for cars, labelled D1_ In each of the diagrams, draw where appropriate, the new demand curve that would result from the events described below each diagram. Label the new demand curve D2. If the event describes only leads to a movement along the old curve, leave the demand curve unchanged but indicate two points on the curve which are connected with the event described and the direction of the change. P D1 p D1 Q Q An increase in average household income A steep rise in petrol prices P D1 P D1 Q Q An increase in the price of cars The introduction of more convenient forms of public transport