Please help quick

Q1) Bladder cancer is mostly found in old people. According to a large nationwide survey, the age at the time of diagnosis is 73.0 years on average and the standard deviation of the age is 9.0. The distribution of the age may be skewed to the left. 64 patients were randomly selected. a) Approximate the sampling distribution of the sample mean age (at the time of diagnosis). Justify your answer briefly. b) Calculate the probability that the sample mean age is older than 71 years old