According to a magazine: as of Januaryr 201B: 9% of chief executive officers were women. Complete parts a through d based on a random sample of 12 C505. <:> a. What is the probability that one corporate ofcer was female? The probability is :|. (Round to four decimal places as needed.) b. What. is the probability that fewer than four corporate ofcers were female? The probability is :|. (Round to four decimal places as needed} c. What is the probability that. more than two corporate ofcers were female? The probability is D. (Round to four decimal places as needed.) :1. What are the mean and standard deviation for this distribution? The mean number of females is :|. (Type an integer or a decimal. Do not round.) The standard deviation of the number of females is |:. (Round to four decimal places as needed.)