$1.$ Poly$($methyl methacrylate$)$ is often used as a bone cement during artificial joint surgeries. For the attached stress$-$strain curve of PMMA, what is the Young's modulus at $\backslash (40^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )($close to body temperature$)$ and $\backslash (60^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )?$ Assuming the sample is incompressible, what is the compressive modulus and the shear modulus at these temperatures?

Stress$-$strain curve for PMMA.