Members $AB$ and $BC$ shown are pinned together at point $B$, and are pinned to the floor at points $A$ and $C$. The structure supports a pulley at point $B$ with which, a person is hoisting a 2.0 kN load. Member $BC$ has a weight of 1.6 kN, which may be considered to act at its center, while $AB$ is made of strong-light material and has negligible weight.
Determine the value of the external support reactions at $A$ and $C$.
