Consider the following graph that displays original data together with 4- point smoothed data that has been applied. Blue - original data Red - smoothed data 100 95 90 85 80 75 70 65 60 55 50 1 2 3 4 5 6 7 8 9 1011 12 Seasons There are two questions to answer in the space provided below (a) Has the smoothing been effective? Explain (b) Has a trend been revealed. If yes, describe the trend. Sales (x $1000)

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