Starting salaries of 70 college graduates who have taken a statistics course have a mean of $43,267. Suppose the distribution of this population is approximately normal and has a standard deviation of $10,958.
Using an 85% confidence level, find both of the following:
(NOTE: Do not use commas or dollar signs in your answers.)

(a) The margin of error:

(b) The confidence interval for the mean $\mu$: $< \mu <$