Past records indicate that the probability of online retail orders that turn out to be fraudulent is 0 07 Suppose that on a given day 21 online retail orders are placed Assume that the number of retail orders that turn out to be fraudulent is distributed as a binomial random variable Complete parts a through d below a What are the mean and standard deviation of the number of online retail orders that turn out to be fraudulent The mean number of online retail orders that turn out to be fraudulent is Type an integer or a decimal Round to four decimal places as needed