Below you are given the first five values of a quarterly time series. The multiplicative model is appropriate and a four-quarter moving average will be used. 
An estimate of the seasonal-irregular component for Quarter 3 of Year 1 is
Definitions:
Mental Institution
A facility specialized in the treatment and care of individuals with mental health disorders.
Moors
A term historically used to refer to Muslim inhabitants of the Maghreb, the Iberian Peninsula, Sicily, and Malta during the Middle Ages.
Teresa of Avila
A significant figure in Christian mysticism and the Catholic Reformation of the 16th century, known for her writings on the contemplative life and spiritual growth.
St. Vincent de Paul
A Catholic voluntary organization dedicated to the service of the poor, established by Frederic Ozanam and named after the saint known for his charity.
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