For a math test on which the mean was 59 and the standard deviation was 4, what

Question:

For a math test on which the mean was 59 and the standard deviation was 4, what is the probability that a student randomly selected from this class will have a score
a. between 55 and 65?________
b. between 60 and 65? ________
c. above 65? ________
d. between 60 and 50? ________
e. between 55 and 50? ________
f. below 55? ________