You have been appointed as an economic advisor to the principle of Bright Sparks College, a firm operating in the market for tertiary education. Over the past 18 months the following simultaneous changes have been noticed in the market for tertiary education: A decrease in consumer income; An increase in the cost of providing tertiary education services. Explain, with the aid of a graph, the impact of the above changes on the equilibrium price and equilibrium quantity in the tertiary education market. (Note: Seven marks for a graph and 8 marks for the explanation.) Marks will be awarded for your ability to integrate theory with the scenario provided.