Please help me out with exact explanations..(How to do in TI-84 plus calculator!)

Assume that the heights of adult puffins are normally distributed, with a mean of u = 16.4 inches and a standard deviation of o = 2.3 inches. For a random sample of 9 puffins, answer the following: What is the mean of the distribution of x ? 16.4 What is the standard deviation of the distribution of * ? 2.3 What is the probability of obtaining a sample mean height less than 15.3 inches? 0.3162 What is the probability of obtaining a sample mean height greater than 16.7 inches? 0.4481Assume that the mean number of yearly burglary attempts in Normal, IL is / = 15, with a standard deviation of o = 3. For a random sample of 31 years, answer the following: What is the mean of the distribution of a ? What is the standard deviation of the distribution of a ? What is the probability of obtaining a sample mean of less than 13.7 burglary attempts? What is the probability of obtaining a sample mean greater than 16.2 burglary attempts