Suppose that the speeds of cars travelling on California freeways arenormally distributedwith ameanof63

miles/hour. The highway patrol's policy is to issue tickets for cars with speeds exceeding75

miles/hour. The records show that exactly1

%

of the speeds exceed this limit. Find thestandard deviationof the speeds of cars travelling on California freeways. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.