solve it using the textbook formula

One college class had a total of 75 students. The average score for the class on the last exam was 62.5 with a standard deviation of 4.3. Arandom sample of 39 students was selected. a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than 54? c. What is the probability that the sample mean will be more than 637? d. What is the probability that the sample mean will be between 61.5 and 53.5? a. The standard error of the mean is [ |. (Round to two decimal places as needed.)