Marine researchers in the UK recently conducted a study of oil spills from oil tankers that run aground. Using historical data, the study reported that if a tanker goes aground, there is a 30% chance that it will spill oil. Suppose 15 tankers go aground in the next year. Assuming that all the binomial conditions are met, use the binomial table to determine the probability that

a. Exactly four of the tankers will spill oil.

b. No more than one of the tankers will spill oil.

c. Between two and five of the tankers (inclusive) will spill oil