The following data relate the sales gures of the bar in Mark Kaltenbach's small hed-and-breakfast inn in Porand, to the number of guests registered that week: Eh Week Guests Bar Sales 1 16 $321] 2 12 $255 3 18 $331] 4 14 $321] a] The simple linear regression equation that relates bar sales to number of guests {not to time] is (round your responses to one decimal place): Bar Sales = Cl + D Xguesls b] lithe forecast is 20 guests next week, the bar sales are expected to be $|:| {roundyour response to one decimal place)