Height of a plant switchgrass growing in a plot is normally distributed with a mean of 200 cm and a standard deviation of 15 cm. 1) You randomly select one plant from the plot, what is the probability that the height of a randomly selected plant will be between 185 cm and 215 cm? 2) If you select 16 plants (n = 16), what is the probability that the average height of the 16 plants will be between 185 cm and 215 cm?