Task 3 The quarterly sales figures for the number of shoes (pairs) sold at a shoe shop is shown on the table below. Year Quarter Sales 2015 139 135 91 4 113 2016 145 137 95 118 2017 150 AWNHAWNHAWNE 141 99 119 2018 156 149 105 125 Required: 1. Draw a line graph to represent the sales figures. 2. Calculate the moving averages. 3. Calculate the centre moving averages 4. Present the original sales data and the trend of sales figures on the same line graph