In a study of left- and right-handers' reaction times to tones delivered to the right ear, the right-handers' reaction times were approximately normally distributed with a mean of 210 milliseconds and standard deviation of 40 milliseconds. The mean reaction time for left-handers was 240 ms. a. Sketch a normal distribution that describes right-handers' reaction times, and locate the mean reaction time for left-handers in this distribution. b. What proportion of right-handers reaction times would be faster than the mean reaction time for left-handers