Problem $3-29($Algo$)$ THIS HAS BEEN INCORRECT $3$ TIMES. please do not send the solution of this problem unless you know it is $100\%$ correct.

Mark Price, the new productions manager for Speakers and Company, needs to find out which variable most affects the demand for

their line of company speakers. He is uncertain whether the unit price of the product or the effects of increased marketing are the

main drivers in sales and wants to use regression analysis to figure out which factor drives more demand for its particular market.

Pertinent information was collected by an extensive marketing project that lasted over the past $12$ years and was reduced to the data

that follow:

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

Note: Negative values should be indicated by a minus sign. Round your answers to $4$ decimal places.

advertising

c$.$ Predict average yearly speaker sales for Speakers and Company based on the regression results if the price was $$298$ per unit and

the amount spent on advertising $($in thousands$)$ was $$898.$

Note: Enter your answer in thousands. Round your intermediate calculations and final answer to $2$ decimal places.

Forecasted sales

thousand units