I would really appreciate a thorough explanation as my instructor has not made this very clear.

$7(17$points$)$ Compute and tabulate for the following closed$-$polygon traverse given an azimuth of $AB=75$

$14\text{'}47"$: $($a$)$ preliminary bearings $($b$)$ unadjusted departures and latitudes $($c$)$ linear misclosure and $($d$)$ relative

precision. $($Note: line BC bears NE$.)$