77 percent of automobiles are covered by insurance (CNN, February 23, 2006). On a particular weekend, 10 automobiles are involved in traffic accidents. a. What is the expected number of these automobiles that are covered by insurance? b. What are the variance and standard deviation? c. What is the probability that all the automobiles are covered by insurance? d. What is the probability that there are more than or equal to 8 automobiles covered by insurance?