question in statistics.please answer quickly

Question 2. [Marks: 12.5] a) Below are given the figures of productions (in million tons) of a cement factory from the year [9] 2005 to 201 1. Year 2008 2009 2010 2011 2012 2013 2014 Production 77 88 94 85 91 98 90 Find the trend values using the method of least square and plot them graphically. Also find the estimated production of cement for the year 2017 according to your method. b) Explain the basic difference between cyclical variation and seasonal variation with an example. [3.5]