a) Figure 2 illustrated a scenario of people line up to buy a cinema ticket at a counter. Figure 2 i. Identify the best data structure approach to explain the scenario in Figure 2. (2 marks) ii. Explain the scenario process based on your answer in question 3a(1). (12 marks) b) Based on the data below; 46 72 32 95 20 42 41 43 87 24 99 73 i. Construct a Tree diagram. ii. Provide the postOrder traversal. (7 marks) (4 marks)