Use the data given below to answer the following question(s) .
The sales details of a particular game are shown below.The value of k is set at 3. 
-Using the given data,calculate the value of the mean absolute deviation.
Definitions:
Centered Moving Average
A method of smoothing data by calculating averages of different subsets of the full data set to identify trends.
Quadratic Model
A statistical or mathematical model in which the relationship between the dependent variable and one or more independent variables is represented by a second-degree polynomial.
Time Series
A sequence of data points collected or recorded at successive points in time, typically with equal intervals between them.
Seasonal Index
A factor used in time series analysis that adjusts for the seasonality of data, reflecting typical fluctuations that occur at specific times of the year.
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