Sales data were collected from a small bookstore. the following is an equation for the regression line of the data. modifyingabove sales with caret equals 8.94 plus 0.833 number of salespeople working the assumptions and conditions for regression are met, and from technology, it is known that se (b 1 )equals 0.0847 and s subscript e baseline equals 1.300. complete parts a through c below. a) find the predicted sales on a day with 12 employees working the predicted sales on a day with 12 employees working is 1837 thousand dollar (round to two decimal places as needed.) b) find the 95% confidence interval for the mean sales on a day with 12 employees working. the interval in thousands is (round to two decimal places as needed.