Suppose the following data shows the interest rates on a sample of 5 mortgages: 6.00%, 2.30%, 3.25%, 5.45%, 4.85%. Calculate the standard deviation of the sample. (round to 2 decimal places)

What is the standard error of the mean for this sample?

Calculate the samples upper and lower bounds (i.e. confidence intervals) using a 95% level of confidence

Please give me step by step instructions. I havent taken statistic in years!