The values of the exterior angles in the figure shown, measured by a one second theodolite, are: Angle ABC BCD CDE DEF EFA FAB Mean observed Value 272 03' 10" 272°05' 51" 104° 50' 31" 261° 11'06" 266° 10' 15" 263° 38' 25" (a) Determine the sum of the measured angles. (b)Determine the angular error of the traverse. (c) Adjust the angles of the traverse to eliminate the error. (d) Given that the whole circle bearing of line AB is 43°40'45", calculate the bearings of all other lines of the traverse. The sum of exterior angles = 62n+4) * 90