Police records in the town of Saratoga show that 15 percent of the drivers stopped for speeding

Question:

Police records in the town of Saratoga show that 15 percent of the drivers stopped for speeding have invalid licenses. If 12 drivers are stopped for speeding, find the probability that
(a) None will have an invalid license;
(b) Exactly one will have an invalid license;
(c) at least 2 will have invalid licenses.