a variable is normally distributed with mean 19 and standard deviation 5. use your graphing calculator to find each of the following areas. write your answers in decimal form. round to the nearest thousandth as needed. a) find the area to the left of 16. b) find the area to the left of 14. c) find the area to the right of 15. d) find the area to the right of 27. e) find the area between 14 and 30.