02(1)(4) refer to the following information Q2: The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker. They sample 12 brokers and determine the number of new clients 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 22 2 1. Referring to the above Table, the least squares estimate of the slope is 2. Referring to Table, the least squares estimate of the Y-interceptis 3. Referring to Table, the prediction for the amount of sales in $1.000s) for a person who brings 25 new clients to the firm is 4. Referring to Table, the total sum of squares (SST) is