$1-$ From the information given in the table below determine the Back Bearings, the Azimuths and the Back Azimuths. Use the value of the bearing in the first column to determine the values of the back bearings, Azimuth ${?}^n$ and the back azimuths ${?}^n.$

$\backslash$table$[[$Bearing$,$Azim ${?}^n,$Back Azimuth ${?}^n,],[$S $50{15}^{\text{'}}E,,,],[$N $85{00}^{\text{'}}E,,,],[$S $30{40}^{\text{'}}W,,,],[$S $49{30}^{\text{'}}E,,,],[$N $11{50}^{\text{'}}W,,,],[$N $67{20}^{\text{'}}E,,,],[$S $89{15}^{\text{'}}E,,,],[$S $29{45}^{\text{'}}W,,,],[$N $02{40}^{\text{'}}{15}^{\text{'}\text{'}}W,,,],[N70{00}^{\text{'}}{23}^{\text{'}\text{'}}E,,,]]$