The 15 most populous states in the united states have an average population of 141.51 million, with a standard deviation of 87.49 million. virginia and washington have populations of 83.83 million and 71.70 million, respectively. texas and pennsylvania have z-scores of 1.52 and −0.15, respectively. part a: list these four states in order from smallest to largest populations. (4 points) part b: explain your reasoning mathematically and be sure to include all necessary calculations. (6 points) (10 points)