7) (10 Points) Professor Wan is helping a group of student in his class. Some of the students need help with factorization (50%), others need help with quadratic equations (70%), some of the students need help in both factorization and quadratic equations (60%). What is the probability that one student selected at random will need help with factorization or quadratic equations? H 8) (15 Points) According to a college registrar's office 40% of the students enrolled in an introductory statistics class this semester are freshmen. a) You want to know the probability that in a random sample of 5 students none of them is a freshman? b) In a random sample of 10, what is the probability that exactly two are freshmen