5) A used car dealership currently has 4 cars on their lot. Each car undergoes a safety test and the results of that test range from 0% (completely unsafe) to 100% (completely safe). Suppose the safety scores for the cars are: Car 1 2 3 4 Transmrssron Manual Automatic Automatic Manual Type Safety Score 58 92 85 71 What is the mean safety score for the used cars on the lot? How many simple random samples of size 2 are possible? List the possible simple random samples. For each one, find the sample mean. What is the variance of the sample mean for this sampling design (i.e., the design explained in part b)? P-PP'P