In the free body diagram below there is a horizontal 77N force and a downward 55N force acting on the object from the center of mass shown below. a. What should the magnitude of the force be(as shown with a question mark) to stop the object moving and produce no net force? b. What is the angle the calculated force makes with the dashed line? c. What would the acceleration of the object be if only the 55N and 77N force acted on the object had a mass of 12kg