A (statistically savvy) local angler remarks that the weights of the blue gill (fish) caught from Big Bass Lake are Normally distributed. He doesn't remember the mean or the standard deviation, but he does remember that the first quartile is 2 pounds, 2 ounces and the third quartile is 3 pounds, 6 ounces. The standard deviation of blue gill weights is closest to: Select one: a. 20 ounces b. 15 ounces c. 12 ounces d. 10 ounces e. 5 ounces