Sales of tablet computers at Marika$$ Gonzalez's electronics store in$$ Washington, D$.$C$.,$ over the past $10$ weeks are shown in the table$$ below:

$$

Week

$1$

$2$

$3$

$4$

$5$

$6$

$7$

$8$

$9$

$10$

Demand

Part $2$

$$a$)$ The forecast for weeks $2$ through $10$ using exponential smoothing with $=$ and a week $1$ initial forecast of are $($round your responses to two decimal$$ places$)$:Sales of tablet computers at Marika Gonzalez's electronics store in Washington, D$.$C$.,$ over the past $10$ weeks are shown in the table below:

a$)$ The forecast for weeks $2$ through $10$ using exponential smoothing with $=0\mathrm{.}60$ and a week $1$ initial forecast of $21\mathrm{.}0$ are $($round your responses to two decimal places$)$:

Sales of tablet computers at Marika Gonzalez's electronics store in Washington, D$.$C$.,$ over the past $10$ weeks are shown in the table below:

a$)$ The forecast for weeks $2$ through $10$ using exponential smoothing with $=0\mathrm{.}60$ and a week $1$ initial forecast of $20\mathrm{.}0$ are $($round your responses to two decimal places$)$:

b$)$ For the forecast developed using exponential smoothing $(=0\mathrm{.}60$ and initial forecast $20\mathrm{.}0),$ the MAD $=5\mathrm{.}22$ sales $($round your response to two decimal places$).$

c$)$ For the forecast developed using exponential smoothing $(=0\mathrm{.}60$ and initial forecast $20\mathrm{.}0),$ the tracking signal $=2\mathrm{.}60($round your response to two decimal places$).$