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Please help. Don't know how to plot 4. From the data below, compute a 5-year simple moving average, hence plot the sales data and the

Please help. Don't know how to plot

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4. From the data below, compute a 5-year simple moving average, hence plot the sales data and the moving average & comment on the trend. [8 Marks] Year 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Sales 2350 2370 2310 2460 2380 2570 2570 2760 2840 3000 3100 3360 Formulas

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