For the demand data below, use time series decomposition to make a forecast for the four quarters of $2023.$ Use the multiplicative model. You should use the Least Squares Regression discussed in class.

Year Season t Demand

$($in $1000)$

$2021$ Spring $1205$

Summer $2145$

Fall $3375$

Winter $4575$

$2022$ Spring $5475$

Summer $6255$

Fall $7635$

Winter $8965$

$2023$ Spring $9300$

Summer $10150$

Fall $11435$

Winter $12780$

Answer the following three questions.

What are the seasonal factors for Summer and Winter?

Group of answer choices

$0\mathrm{.}74$ and $1\mathrm{.}09$

$0\mathrm{.}42$ and $1\mathrm{.}75$

$0\mathrm{.}74$ and $1\mathrm{.}75$

$0\mathrm{.}42$ and $1\mathrm{.}09$For the demand data below, use time series decomposition to make a forecast for the four quarters of $2023.$ Use the multiplicative model. You should use the Least Squares Regression discussed in class.

Year Season t Demand

$($in $1000)$

$2021$ Spring $1205$

Summer $2145$

Fall $3375$

Winter $4575$

$2022$ Spring $5475$

Summer $6255$

Fall $7635$

Winter $8965$

$2023$ Spring $9300$

Summer $10150$

Fall $11435$

Winter $12780$

Answer the following three questions.

What are the seasonal factors for Summer and Winter?

Group of answer choices

$0\mathrm{.}74$ and $1\mathrm{.}09$

$0\mathrm{.}42$ and $1\mathrm{.}75$

$0\mathrm{.}74$ and $1\mathrm{.}75$

$0\mathrm{.}42$ and $1\mathrm{.}09$