6- A soft drink distributor was interested in examining the relationship between the number of ads (x) for his product during prime time on a local television station and the number of sales per week (y) in thousands of cases. He compiled the figures for 20 weeks and computed the following summary information: [6 marks] 12 = 20, Ex; = 92, Ex, = 177, Exy, = 884, 5, = 1.3917, 5y = 2.9069. Find the correlation coefficient for the number of ads during prime time and weekly sales. Find the best-fitting line relating the number of ads during prime time and weekly sales. If the soft drink distributor ran 21 TV ads per week for his product, what would you predict his sales to be