The weight of male babies less than 2 months old in the United States is normally distributed with mean 11.8 pounds and standard deviation 2.7 pounds. (a) What proportion of babies weigh more than 16 pounds? (b) What proportion of babies weigh less than 14 pounds? (c) What proportion of babies weigh between 11 and 16 pounds? (d) Is it unusual for a baby to weigh more than 16 pounds?