A dipole is made up of two charges + q and - q separated by a distance 2a

A dipole is made up of two charges + q and - q separated by a distance 2a. Derive an expression
for the electric field Ee due to this dipole at a point distance r from the centre of the dipole on the equatorial plane. Draw the shape of the graph.
If this, dipole were to be put in a uniform external electric field E obtain an expression for the torque acting on the dipole.