A Massachusetts State Police Officer Measured the Speed of 100

A Massachusetts state police officer measured the speed of 100 motorists on the Massachusetts Turnpike and found that 70 exceeded the posted speed limit by more than 10 miles per hour. The police officer claims that more than 60% of motorists drive at least 10 miles per hour more than the posted speed on the turnpike.
A) Specify the null and alternative hypotheses to test the officer's claim.
B) Calculate the value of the test statistic.
C) At the 5% significance level, what is the p-value to test the officer's claim?
D) At the 5% significance level, does the evidence support the officer's claim?