Mr. James McWhinney, president of DanielJames Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information. The X column indicates the number of client contacts last month. and the Ycolumn shows the value of sales (55 thousands) last month for each client sampled. Sales Sales Number of ($ Number of ($ Contacts, thousands), Contacts, thousands), x Y X Y 19 $34 18 $21 20 35 14 21 34 50 16 21 29 31 28 47 27 34 25 34 l a. Not available in Connect. b. Determine the regression equation. (Do not round intermediate calculations and round the final answers to 4 decimal places. Negative answers should be indicated by a minus sign.) b= a = Y": + x c. Determine the estimated sales if 56 contacts are made. (Round the final answer to 4 decimal places.) E