f2 75 degree on left , f1 60 degrees on right in the picture , pleaseeee help i will give review

The hellcopter view in Figure P3.14 shows two people pulling on a stubborn mule; Assume that F1 is 110N and F2 is 70N. The forces are measured in units of newtons (N). Find (a) The single force that is equlvalent to the fwo forces shown. (b) The force that a third person would have to exert on the mule to moke the net force equal to zero. magnitude direction