2.80 INDEX FINGER MUSCLE FATIGUE AND PISTOL FIRING. The U.S. Army reports that muscular fatigue in the trigger finger often hinders firing during pistol shooting training. Human Factors (Nov., 2019) published a study designed to analyze finger strength and the effects of muscle fatigue on the ability to shoot a pistol. One variable of interest was maximum voluntary isometric contraction (MVIC) of the index finger -- a standardized method for measuring (in Newtons) muscle strength. In the experiment, soldiers fired 60 pistol rounds each session, for six consecutive shooting sessions. At rest, expert male shooters were found to have a mean MVIC of 160.3 N, with a standard deviation of 19.6 N. At the end of the repeated shooting sessions, the shooters lost index finger strength, with a mean MVIC of 133.5 N and a standard deviation of 19.6 N. Assume that the distribution of MVIC strength scores is approximately mound-shaped and symmetric. a. Give a range of MVIC values that contain about 95% the index finger strength values for male shooters at rest. b. Give a range of MVIC values that contain about 95% the index finger strength values for male shooters after six consecutive shooting sessions. c. What proportion of male shooters after six consecutive shooting sessions have MVIC strength scores below 94.3 N