Struggling with these probability questions! Please help me to understand! Thank you

Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean u = 233 days and standard deviation o = 11 days. Complete parts (a) through (f) below (a) What is the probability that a randomly selected pregnancy lasts less than 229 days? The probability that a randomly selected pregnancy lasts less than 229 days is approximately (Round to four decimal places as needed ) Interpret this probability Select the correct choice below and fill in the answer box within your choice (Round to the nearest integer as needed ) A. If 100 pregnant individuals were selected independently from this population, we would expect pregnancies to last exactly 229 days. O B. If 100 pregnant individuals were selected independently from this population, we would expect pregnancies to last more than 229 days O C. If 100 pregnant individuals were selected independently from this population, we would expect pregnancies to last less than 229 days. (b) Suppose a random sample of 20 pregnancies is obtained. Describe the sampling distribution of the sample mean length of pregnancies The sampling distribution of x is with My = and ox = (Round to four decimal places as needed.) (c) What is the probability that a random sample of 20 pregnancies has a mean gestation period of 229 days or less? The probability that the mean of a random sample of 20 pregnancies is less than 229 days is approximately (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the answer box within your choice (Round to the nearest integer as needed ) O A. If 100 independent random samples of size n = 20 pregnancies were obtained from this population, we would expect sample(s) to have a sample mean of 229 days or less Click to select your answer(s)