The average high temperatures in degrees for a city are listed. 58, 61, 71, 77, 91, 100, 105, 102, 95, 82, 66, 57if a value of 98° is added to the data, how does the mean change?a. the mean increases by 8.2°. b. the mean decreases by 8.2°. c. the mean increases by 1.4°. d. the mean decreases by 1.4°.