In a sample of 50 NBA (National Basketball Association) players, the sample mean height was 78.3 inches and the sample standard deviation was 4.3 inches. Assume that the heights are approximately bell-shaped. For each part, show work and briefly explain how you got your answer. If needed, round answers to the nearest whole number. a) Approximately how many NBA players have a height between 69.7 and 86.9 inches? b) Approximately how many NBA players have a height between 69.7 and 91.2 inches? c) Approximately how many NBA players have a height less than 86.9 inches