The Centers for Disease Control say that about 30% of high-school students smoke tobacco. Suppose you randomly select high-school students to survey...

The Centers for Disease Control say that about 30% of high-school students smoke tobacco. Suppose you randomly select high-school students to survey them on their attitudes towards smoking. Find the probability of the following events.a. None of the first 4 students you interview is a smoker.b. The first smoker is the sixth person you choose.c. There is at least one smoker in a group of 4