Please help with C

According to a certain organization, adults worked an average of 1,803 hours last year. Assume the population standard deviation is 380 hours and that a random sample of 50 adults was selected. Complete parts a through e below. 3. Calculate the standard error of the mean. 0'; = 53.74 (Round to two decimal places as needed.) b. What is the probability that the sample mean will be more than 1,810 hours? P 601,810) = 0.4482 (Round to four decimal places as needed.) c. What is the probability that the sample mean will be between 1,770 and 1,790 hours? P (1,770 sis 1,790) = (Round to four decimal places as needed.)