I need help with this question.

4. {in points) {a} [if all cars on the interstate, 30% exceed the speed limit. 1What proportion of speeders might we see among the next 51} cars? Check the necessary.r conditions and describe the sample distribution. [b] Speeds of cars on a highway have mean 52 mph and stande deviation 6 mph, and are likely,Ir to he skewed to the right (a few very.r fast drivers). Describe what we might see in random samples of 51} cars