Construct a 95% Confidence Interval for the Population Mean Using $\overline{\mathrm{x}}=\$ 68,400, \mathrm{E}=\$ 14,280$

Construct a 95% confidence interval for the population mean using the given information.
-Starting annual salary for all mechanical engineering graduates, $\overline{\mathrm{x}}=\$ 68,400, \mathrm{E}=\$ 14,280$

A) $\$ 61,260<\mu<\$ 75,540$
B) $\$ 54,120<\mu<\$ 82,680$
C) $\$ 52,140<\mu<\$ 86,620$
D) $\$ 62,210<\mu<\$ 74,550$