A thin infinitely long thread carrying a charge , per unit length is oriented parallel to the

Question:

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 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.
Distribution
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