54% of all violent felons in the prison system are repeat offenders. If 35 violent felons are randomly selected, find the probability that
a. Exactly 18 of them are repeat offenders.
b. At most 19 of them are repeat offenders.
c. At least 19 of them are repeat offenders.
d. Between 16 and 22 (including 16 and 22) of them are repeat offenders.
