The normal model N(58, 21) describes the distribution of weights of chicken eggs in grams. Suppose that the weight of a randomly selected chicken egg has a z-score of -2.01. What is the weight of this egg in grams? Round to the nearest hundredth of a gram.
◦ 15.80 grams
◦ 28.50 grams
◦ 31.20 grams
◦ 38.10 grams