Question 15 of 20 (1 point) view problem in a pop-up assume that the mean systolie blood pressure of normal adults is 120 millimeters of mercury (mm hg) and the standard deviation is 5.6. assume the variable is normally distributed. use a graphing calculator and round the answers to four decimal places. part 1 if an individual is selected, find the probability that the individual's pressure will be between 120.4 and 121.9 mm hg. p120a