YEAR UNIT SALES $($THOUSANDS$)$ PRICE $ PER UNIT ADVERTISING $($$$000)$

$1380276625$

$2680217833$

$38802141,103$

$41,2952091,415$

$51,1462171,215$

$61,1951911,295$

$7880224895$

$81,1032001,103$

$9975222698$

$101,236214895$

$11895228698$

$12802243698$

a$.$ Perform a regression analysis based on these data using Excel.