Attraction force of plane and surface masses

A material disk of radius $r$ has surface density $\rho$. On the perpendicular to the plane of the disk passing through its center there is a material point of mass $m$ at distance $a$ from the center. With what force does the disk attract the point?

A material plane has surface density $\rho$. With what force does the plane attract a material point of mass $m$ located at distance $a$ from the plane?

Find the magnitude of the force with which a homogeneous surface:

Find the force of attraction of a material point of mass $m$ with coordinates $(0 ; 0 ; h)$ by a material disk $\left\{ x^{2}+y^{2} \leqslant R^{2}, z = 0\right\}$, over which mass is uniformly distributed with surface density $\rho_{0}$.

Find the force of attraction of a material point of mass $m$ with coordinates $(0 ; 0 ; h)$ by a material plane, over which mass is uniformly distributed with surface density $\rho_{0}$.