The actual demand for germicidal chemicals at one of BPHs clinics is as follows.

Quarter Gallons of Germicidal Chemicals Used

$1550$

$2490$

$3510$

$4590$

$5595$

$6550$

$7565$

$8610$

$9635$

$10565$

$11572$

$12655$

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.

Looking at the graph in part c$,$ which forecasting method seems to be more appropriate? Why?