An Object Is Being Acted Upon by Three Forces and Moves

Short Answer

An object is being acted upon by three forces and moves with a constant velocity. One force is 60 N along the +x-axis, the second is 75 N along a direction making a counterclockwise angle of 150° with the +x-axis.
(a) What is the magnitude of the third force?
(b) What is the direction of the third force, measured clockwise from the +x-axis?