Using the given frequency distribution table, find the grouped mean. 
Definitions:
Cycles
Periods or sequences in a system or process that repeat in a regular pattern, such as the phases of economic growth and decline or the operation of machinery.
Seasonality
Refers to fluctuations in demand or supply of certain products or services that occur regularly at certain times of the year.
Moving Average
A technique in statistics that involves calculating averages from various subsets within the whole data set for analysis purposes.
Responsiveness
Refers to the ability of a business or system to quickly react to changes or demands in the environment.
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