Required information

A multiple$-$drilling machine is used to simultaneously drill six holes in the steel plate shown. Each drill exerts a clockwise couple of magnitude $50$ lb $-$in$.$ on the plate.

Determine an equivalent couple formed by the smallest possible forces acting at $\backslash ($ A $\backslash )$ and $\backslash ($ D $\backslash ).$

The smallest possible force acting at $\backslash ($ A $\backslash )$ and $\backslash ($ D $\backslash )$ is

lb$.$