9. Listed below are the close-of-business share prices for Fortescue Metals over the last 10 trading days: $5.28 $5.29 $5.41 $5.54 $5.59 $5.46 $5.45 $5.39 $5.46 $5.31 a) Calculate a five-day moving average and plot on a graph. b) Why might a technical analyst seek to plot moving averages? c) Recalculate the moving average using a simple weighted five-day moving average (show your calculations). What is the purpose and advantage of using this method?