Question 4 Table 4-1 represents the sales of laptop for a local electronic store. (a) (b) Table 4-1 Month Quantity of Laptop Sold July 270 August 220 September 380 October 340 November 280 December Compute the forecasted laptop sales for August to December by using a simple exponential smoothing with (1:035 and (1:0.45. Assume the forecast for July is 250 laptop units and Show your answer (round to 2 decimal places) in a table form. (8 marks) Examine the forecasted values that you have computed in (a) and discuss which value of smoothing constant, cc, is recommended. Show your workings. (7 marks) Global warming is a serious threat to mankind, and it has given rise to the increasing number of nongovernmental organisations (NGOs) with the aim of ghting climate change. Demonstrate how the NGOs could use data and forecasting techniques in their quest to ght climate change and campaign effort. [Notes This question is independent of Question 4(a) and Q4(b).] (10 marks)