Camping Time is an outdoor equipment company specialising in all-weather camping equipment. They have branches in Denver, Colorado and Dubai, UAE. The company has recently recruited a new financial director, who would like to review the previous ten years' sales data of the Denver location. Camping Time sales record 2008 - 2017 Year 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Sales (units) 5,000 5,200 6,000 6,900 5,400 6,000 6,500 6,800 7,300 7,800 (a) Using four years moving average, calculate the following: (show all your working) ) (0) (ii) the sales trend the yearly variation the cyclical variation