A small survey yielded the following relationship between people and the cars they drive: A relationship between these cars and the fuel they use was then compiled: fuel ={( Polo, Unleaded), (Mini, Unleaded), (Capri, Leaded), (Clio, Diesel) } a) Write out the drives relationship as a set of ordered pairs. [5 marks] b) Draw an arrow diagram of the fuel relationship. [5 marks] c) Describe how two relations may be composed to create a new relation. Illustrate your answer by drawing the arrow diagram of the composition of the drives and fuel relations above. [6 marks] d) Using your answer to part c), who needs to buy Unleaded fuel? What fuel does Diane need to buy? [4 marks]