11. A missile guidance system has four fail-safe components. The probability of each failing is 0.05. Assume the variable is binomial. Find the following probabilities. a. Exactly two will fail. b. More than two will fail. c. All will fail. (Round this particular answer to six decimal places.) d. Is it likely that all four components will fail? Why or why not. 12. A coin is tossed 5 times and the number of heads is recorded. a. Find the mean for the number of heads. b. Find the variance for the number of heads. c. Find the standard deviation for the number of heads