A set of scores measuring aggression is normally distributed with a mean equal to 23 and a

Question:

A set of scores measuring aggression is normally distributed with a mean equal to 23 and a standard deviation equal to 2.5. Find the proportion:
(a) To the left of x = 19.0
(b) To the right of x = 25.5
(c) Between the mean and x = 19.0
(d) To the left of x = 25.5
(e) To the right of x =19.0