Acharge q1=4.00 mc is located at the origin of a coordinate system. another charge q2=4.60 mc is located at x=-1.10 m and y=-3.80 m, and another q3=4.10 mc is located at x=-3.50 m and y=1.30 m. calculate the magnitude of the net electric force on the charge q1 in newtons (n).