Delta Corp$$s plant in Austin has been experiencing imbalances in its inventory of components used in the production of a line of computer printers. Both stock shortages and overstock conditions are occurring.

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The production analysis group is studying the pattern of demand for component PS$2400,$ a power supply used in many of Delta$$s products. The group believes that the most recent $12$ weeks of demand for the PS$2400$ is representative of the future weekly demand:

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Week

Demand

$($Units$)$

$$

Week

Demand

$($Units$)$

$$

Week

Demand

$($Units$)$

$$

Week

Demand

$($Units$)$

$1$

$159$

$4$

$161$

$7$

$203$

$10$

$168$

$2$

$217$

$5$

$173$

$8$

$195$

$11$

$198$

$3$

$186$

$6$

$157$

$9$

$188$

$12$

$159$

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Use a three$-$week moving average to develop a forecast of the demand for the PS$2400$ component in week $13.$