A thin infinitely long thread carrying a charge , per unit length is oriented parallel to the infinite conducting plane. The distance between the thread

A thin infinitely long thread carrying a charge λ, per unit length is oriented parallel to the infinite conducting plane. The distance between the thread and the plane is equal to l. Find:
(a) The modulus of the vector of the force acting on a unit length of the thread;
(b) The distribution of surface charge density (r (x) over the plane, where x is the distance from the plane perpendicular to the conducting surface and passing through the thread.