An increase in demand (while supply remains constant). (Two marks will be awarded for your scenario, four marks for your graph and four marks for your explanation). (10) Q.5.2 An increase in demand and a simultaneous decrease in supply. (Two marks will be awarded for your scenario, five marks for your graph and three marks for your explanation). (10) Q.5.3 A decrease in demand and a simultaneous increase in supply. (Two marks will be awarded for your scenario, five marks for your graph and three marks for your explanation). (10)