From the data given below in Table 4, compute the index numbers of prices taking 2012 as base using a. Simple aggregative price index number method Commodity Price in PKR Year Firewood Soft Coke Kerosene Oil Matches 2012 3.25 2.50 0.20 0.06 2013 3.44 2.80 0.22 0.06 2014 3.50 2.00 0.25 0.06 2015 3.75 2.50 0.25 0.06 Table 4: Table for question number 5a