2) BMW car sales was growth in HK, for the year of 2011 are shown in the following table, along with monthly indexes (seasonal relatives), which are supplied to the dealer by the regional distributor. (Total 30%) a) Plot the data. Does there seem to be a trend? (5%) b) Deseasonalise car sales. (10%) c) Plot the deseaonalised data on the same graph as the original data. Comment on the two graphs. (5%) d) Assuming no proactive approach on the part of management, discuss how you would forecast sales for the rst three months of the next year. (Moving average forecast may be used) (5%) e) What action might management consider based on your ndings in part b? (5%)