66% of all violent felons in the prison system are repeat offenders. If 35 violent felons are randomly selected, find the probability that


a. Exactly 23 of them are repeat offenders.
b. At most 23 of them are repeat offenders.
c. At least 23 of them are repeat offenders.
d. Between 19 and 25 (including 19 and 25) of them are repeat offenders