(1 point) The Normal distribution with mean = 6.8 and standard deviation = 1.6 is a good description of the lowa Test vocabulary scores of seventh grade students in Gary, Indiana. This is a continuous probability model for the score of a randomly chosen student. Figure 3.1 (p. 68) pictures the density curve. Call the score of a randomly chosen student X for short. Note: If necessary, use <= to represent and >= to represent . (a) Write the event "the student chosen has a score of 5.2 or lower" in terms of X . (b) Find the probability of an event which represents "the student chosen has a score of 5.2 or lower". .