The managers of a brokerage firm are interested in finding out if the number of new customers a broker brings into the rm affects the sales generated by the broker. They sample 12 brokers and determine the number of new customers they have enrolled in the last year and their sales amounts in thousands of dollars. These data are presented in the table that follows. Broker Clients Sales 1 27 52 2 1 'l 37 3 42 64 4 33 55 5 15 29 6 15 34 7 25 58 8 36 59 9 28 44 1 0 30 48 1 1 1 7 3 1 12 22 38 1. The prediction for the amount of sales (in $1 ,0003) for a person who brings 25 new customers into the rm is [Blank]. (5 marks) 2. Set up a scatter diagram. (5 marks) 3. The coefcient of correlation is [Blank]