This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Two shafts AC and CF, which lie in the vertical xy plane, are connected by a universal joint at C. The bearings at B and D do not exert any axial force. A couple of magnitude 750 lbin. (clockwise when viewed from the positive x-axis) is applied to shaft CF at F. At a time when the arm of the crosspiece attached to shaft CF is horizontal, determine the magnitude of the couple that must be applied to shaft AC at A to maintain equilibrium. (You must provide an answer before moving on to the next part.) The magnitude of the couple MA that must be applied to maintain equilibrium is 866.03 2% lbin