Question: Create a 4 period moving average with additive trend in excel using StockPriceTimeSeries. Optimize the model for the value of x that minimizes the MSE.

Create a 4 period moving average with additive trend in excel using StockPriceTimeSeries. Optimize the model for the value of x that minimizes the MSE. Calculate the MSE for the model and next years prediction.

What is the MSE for this model? (use 2 decimal places)

StockPriceTimeSeries (DATA)

Time Period	Stock Price
2000	70.23
2001	72.39
2002	72.93
2003	73.65
2004	73.65
2005	74.27
2006	74.22
2007	74.47
2008	74.99
2009	75.95
2010	76.51
2011	77.79
2012	78.35
2013	79.41
2014	80.46
2015	80.53
2016	80.99
2017	81.56
2018	82.21

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