Mr. K was told that 5/8 of the students in his class own a gun. He then randomly selects 10 students to check if they own a gun. Part a asks for the probability that none of the 10 students own a gun. Part b asks for the probability that students who don't own a gun cannot do their homework if Mr. K finds that 5 or more of the 10 students own a gun. Both probabilities are calculated using the binomial distribution formula.