Question: Last year's survey of random drivers on a highway by the Highway Patrol revealed that 480 out of 540 drivers were properly belted into their seats.

A (2) Calculate the point estimate for the proportion of drivers on that highway who were properly belted into their seats.

B (3) Construct a 95% confidence interval for the proportion of all drivers (on that section of highway) that wore their seatbelts. (Show your work or calculator operations)

C. (3) Interpret the confidence interval in the context of the original problem.

D. (2) In this year's survey, it was determined that 90% of drivers wore their seatbelts. Can the highway patrol claim that the proportion has changed? Explain your answer.