Me will give 20 points
which of the sets of ordered pairs represents a function?

a = {(−5, 5), (−2, 2), (2, −2), (5, −5)}

b = {(4, 2), (3, −2), (9, 4), (11, −3)}

only a
only b
both a and b
neither a nor b

Suppose medical records indicate that the length of newborn babies (in inches) is normally distributed with a mean of 20 and a standard deviation of 2.6. find the probability that a given infant is between 14.8 and 25.2 inches long.