Score: 0 of 4 pts 24 of 25 (21 complete) de 5.4.37-T pp , The lengths of lumber a machine cuts are normally distributed with a mean of 93 inches and a standard deviation of 0.4 in (a) What is the probability that a randomly selected board cut by the machine has a length greater than 93.09 inches? (b) A sample of 42 boards is randomly selected. What is the probability that their mean length is greater than 93.09 inches? (a) The probability is 0.3745 (Round to four decimal places as needed.)