A rigid bar $\mathrm{ABC}$ is pinned at $\mathrm{A}$ and supported by a steel wire at $\mathrm{B}$. Before weight $\mathrm{W}$ is attached to the rigid bar at $\mathrm{C}$, the rigid bar is horizontal.

After weight $\mathrm{W}$ is attached and the temperature of the assembly has been increased by ${50}^{\circ }\mathrm{С}$, careful measurements reveal that the rigid bar has deflected downward $2.52 \mathrm{mm}$ at point $\mathrm{C}$.

Determine: a) The normal strain in wire $\left(1\right)$.
                 b) The normal stress in wire $\left(1\right)$.
                 c) The magnitude of weight $\mathrm{W}$.