In the united states, birth weights of newborn babies are approximately normally distributed with a mean of μ = 3,500 g and a standard deviation of σ = 500 g. According to the empirical rule,
a)68% of all newborn babies in the united states weigh between____and_____ .
b)95% of all newborn babies in the united states weigh between_____and______.
c)99.7% of all newborn babies in the united states weigh between____and ______.