The point `z_1=3+sqrt(3)i` and `z_2=2sqrt(3)+6i` are given on la complex plane. The complex number lying on the bisector of the angel formed by the vectors `z_1a n dz_2` is `z=((3+2sqrt(3)))/2+(sqrt(3)+2)/2i` `z=5+5i` `z=-1-i` none of these