5. Brittney and Jake are salespersons Open with XYZ that produces gadgets and widgets. Their sales numbers for the year are displayed below. 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter a) Find the Brittn 54 65 47 30 both ey Jake 51 75 43 31 Jake. mean sales for Brittney and Show your work. Mean (Brittney) = Mean (Jake) = b) Calculate the variance and standard deviation for Brittney's sales numbers. c) Calculate the variance and standard deviation for Jake's sales numbers. Jake's Data (x-mean) (x - mean) (x - mean)2 (x) Brittney 's (x-mean) Data (x) 54 65 47 30 Total Page 3 / 5 51 75 43 31 + Total