A three$-$point bend specimen is tested in displacement control at an elevated temperature.

The displacement rate is increased in steps as the test progresses. The load, load line displacement rate, $\frac{a}{W},$ and crack velocity are tabulated below. Compute $C^{**}$ and construct a $log-log$ plot of crack velocity versus $C^{**}.$ The specimen thickness and width are $25$ and $50$ mm $,$ respectively. The creep exponent $(n)=5\mathrm{.}0$ for the material.

a$)$ Determine the slope $m$ and compare with $n.$

b$)$ Find the parameter $y$ in the equation

$\backslash$table$[[{}^{}(\frac{m}{s}),$Load $(kN),\frac{a}{W},a^{}(\frac{m}{s})$