Q2 (30 points) The following time series shows the weekly expenditures of a family over the past 11 weeks. a) (10 points) Visualize the time series data with a line chart and identify any time series pattern. b) (5 points) Forecast the sales for the 12th week with 3-week moving average. c) (10 points) Forecast the sales for the 12th week with exponential smoothing method with alpha = 0.3. d) (5 points) Which method fits better? why? Exponential Moving Average Smoothing Week Sales ($) 3-week Sq Error 0.3 5q Error a) Line chart 1 425 415 440 414 431 420 426 444 431 10 422 11 430 12 N/A dj MSE