a) What are the units of the residuals? dollars number of sales people working thousands of dollars The residuals do not have units. b) Which residual contributes the most to the sum that was minimized according to the Least Squares Criterion to find this regression? (Type an integer or a decimal.) c) Which residual contributes least to the sum that was minimized according to the Least Squares Criterion to find this regression? (Type an integer or a decimal.) Data table Sales People Working Sales Residual (in $1000) 3 11 -0.18 4 12 -0.19 5 14 0.79 8 15 - 1.26 11 19 -0.31 11 21 1.69 13 21 -0.35 14 23 0.64 16 23 - 1.40 18 27 0.57 Print Done The residuals for a regression of Sales on Number of Sales People Working for a small bookstore are shown in the accompanying table. Complete parts a through c below.