Q4(a) For each data set below, determine the suitable quantitative forecasting method to be used. Justify your answer. Q4(a)(i) Quarterly billing for electricity usage for four years in Table 4(a). (2 marks) 4 Quarter 1 2 Table 4(a) Year 1 2 3 63 65 67 102 102 103 151 159 161 72 71 77 72 119 3 4 175 87 Q4(a)(ii) The number of new contributors to a public radio station's annual fund drive over the last ten years is 63, 58, 61, 72, 98, 103, 121, 147, 163 and 198 (2 marks) Q4(a)(iii) Historical records of attendance at football games is 5346, 7812, 6513,5783, 5982, 6519, 6283, 5577, 6712 and 7345 (2 marks)