2. The ages of students in a statistics class are listed below. Age of students 22 20 25 23 2? 30 13 31 1'3 45 a. Create a stem plot (2 pts} b. What is the mean age of the student? (2 pts} 3. Jennyr likes to have at least a mill: average to pass her statistics class. Her previous fourtest scores are 52%, 56%, ?d% and T1%. What is the minimum score Heidi needs on the nal exam to pass the class? (4 pts} 4. Consider the following data and corresponding weights. a. Compute the weighted mean. {2 pts} b. Compute the mean without weighting. {2 pts}