An upper-level sociology class at a large urban university has 112 students, including 26 seniors, 36 juniors, 30 sophomores, and 20 freshmen. 4. Imagine that you choose one random student from the classroom (perhaps by using a random number table). What is the probability that the student will be a junior (2 pts)? 5. What is the probability that the student will be a freshman (2 pts)? 6. If you are asked to select a proportionate stratified sample of size 30 from the classroom, stratified by class level (senior, junior, etc.), how many students from each group will there be in the sample (4 pts)? 7. If instead you are to select a disproportionate sample of size 32 from the classroom, with equal numbers of students from each class level in the sample, how many freshmen will there be in the sample (2 pts)