2. The ages of students in a statistics class are listed below. Age of students 22 20 25 23 27 30 18 31 19 45 45 19 36 27 19 26 33 40 35 24 a. Create a stem plot (2 pts) b. What is the mean age of the students? (2 pts) 3. Jenny likes to have at least a 70% average to pass her statistics class. Her previous four test scores are 52%, 66%, 76% and 71%. What is the minimum score Heidi needs on the final exam to pass the class? (4 pts)