$\backslash$table$[[$Quarter$,\backslash$table$[[$Gallons of Germicidal$],[$Chemicals Used$]]],[1,550],[2,490],[3,510],[4,590],[5,595],[6,550],[7,565],[8,610],[9,635],[10,565],[11,572],[12,655]]$

Plot the data in the previous table on a graph Do you detect any trend, seasonal pattern, or random variations?

Forecast demand from quarter $5$ to quarter $13$ using a four$-$quarter SMA. Plot your forecast on the same graph as the actual demand.

Forecast demand from quarter $3$ to quarter $13$ using a WMA with weights $0\mathrm{.}7$ and $0\mathrm{.}3.$ Plot your forecast on the same graph as the actual demand and the SMA.