4. According to information Please Almanac, 80% of adult smokers started smoking before they were 18 years old. Assume all samples consist of smokers at least 18 years old and are randomly selected. a. What is the probability that, in a sample of 150 smokers, between 110 and g started smoking before the age of 18? b. What is the probability that at least 70% of the smokers in a sample of Q started smoking before the age of 18? c. Find the probability that less than 50in a sample of 230 did NOT start smoking before the age of 18