Week

$1$

$2$

$3$

$4$

$5$

$6$

$7$

$8$

$9$

$10$

Demand

$19$

$23$

$29$

$37$

$26$

$30$

$37$

$22$

$24$

$29$

Forecast

$19\mathrm{.}0$

$$

$19$

$$

$21$

$$

$25$

$$

$31$

$$

$28\mathrm{.}5$

$$

$29\mathrm{.}25$

$$

$33\mathrm{.}13$

$$

$27\mathrm{.}57$

$$

$25\mathrm{.}79$

Part $3$

$$b$)$ For the forecast developed using exponential smoothing $($alpha $=0\mathrm{.}50$ and initial forecast $19\mathrm{.}0),$ the MAD$=$

$$

$5\mathrm{.}62$ sales $($round your response to two decimal$$ places$).$

Part $4$

$$c$)$ For the forecast developed using exponential smoothing $($alpha $=0\mathrm{.}50$ and initial forecast $19\mathrm{.}0),$ the tracking signal$=$

$$

enter your response here $($round your response to two decimal$$ places$).$