The table below provides the monthly percentages of all on-time orders received by the customers over the past 12 months collected by a popular online shopping website. To forecast the subsequent month percentage, two approaches are considered: three-month moving average and exponential smoothing with ? = 0.2.

a) Draw a time-series plot of the given monthlypercentage of on-time order data. [3 marks] b) Statethe type of pattern that exists in the plot. [2 marks] c) Calculate the MSE (mean squared error) values of both approaches. [6 marks] d) Calculate the MAPE (mean absolute percentage error) of both approaches.[6 marks] e) Which approach does provide a better forecast? Why? [2 rrarks] f) Calculate the forecast for the 13th month, using the most appropriate method. [1 marks]