This exercise contains only parts b,c, and d. b) Using the least-squares regression method, the equation for forecasting is (round your responses to four decimal places): Y=+x Sales of tablet computers at Ted Glickman's electronics store in Washington, D.C., over the past 10 weeks are shown in the table below: \begin{tabular}{lcccccccccc} \hline Week & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \\ \hline Demand & 21 & 23 & 29 & 37 & 24 & 29 & 35 & 22 & 25 & 29 \\ \hline \end{tabular} \begin{tabular}{lcccccccccc} \hline Week & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \\ \hline Demand & 21 & 23 & 29 & 37 & 24 & 29 & 35 & 22 & 25 & 29 \\ Forecast & 21.0 & & & & & & & & & \\ \hline \end{tabular}