1. The following data were collected for the yield (number of apples per year) of Jim's apple farm over the past decade, starting from the earliest, are 600, 625, 620, 630., 700, 720, 750, 755, 800, 790. Is the yield stationary? Explain using a time series plot. Obtain the smoothed series of 2-term moving averages and 4term moving averages. Make a sensible comparison of these two lters