In a certain country, the mean birth weight for boys is 3.28 kg, with a standard deviation of 0.57 kg. Assuming that the distribution of birth weight is approximately normal, complete parts a through a below. a. A baby is considered of low birth weight if it weighs less than 2.5 kg What proportion of baby boys in this country are born with low birth weight? The proportion of baby boys that are born with a low birth weight is 0.064 (Round to three decimal places as needed.) b. What is the z-score for a baby boy that weighs 1.5 kg (defined as extremely low birth weight)? The 2-score is - 3.12 (Round to two decimal places as needed.) c. Typically, birth weight is between 2,5 kg and 4.0 kg. Find the probability a baby is born with typical birth wolght The probability that a baby is born with typical birth weight is (Round to three decimal places as needed.)