Answer this question and answer all parts ASAP

3. It was estimated that on the average two cars pass through an intersection between 10 and 1 1 in the morning. Let x represent the number of cars passing through that intersection during this time. a) . What is the probability distribution of x? b) What is the probability that only 2 cars have passed through that intersection? c) What is the probability that more than 7 cars passed through the intersection? d) What is he mean of x? e) What is the variance of x