Question 10 Suppose tree diameters of a certain species of tree from some defined forest area are assumed to be normally distributed with mean = 8 (inch) and variance 4 (inch?). Find the probability of a tree having an unusually large diameter, which is defined as > 12 inch. (A). 0.0228; (B). 0.8413; (C). 0.9772; (D). 0.9817; (E). 0.1587