9. There are two conducting cones, one 0-60° and the other 0-120°, are separated by an infinitesimal gap at the origin. If V(0-60°)=100V and V(0-120°)=0V, (Hint: In (tan)= sine 1) Find the potential and the electric field between the two cones. 2) Find the charge density at the surface of 0-60° cone..