Two Forces Act at a Point in the Plane $63.6$ And $45.0 \mathrm { lb }$

Two forces act at a point in the plane. The angle between the two forces is given. Find the magnitude of the resultant
force.
-forces of $63.6$ and $45.0 \mathrm { lb }$ , forming an angle of $98.5 ^ { \circ }$ (round to the nearest pound)

A) $83 \mathrm { lb }$
B) $6916 \mathrm { lb }$
C) $72 \mathrm { lb }$
D) $108 \mathrm { lb }$