Sol by hand step by step in paper please in paper Example $5\mathrm{.}5$: A thin piezoelectric plate of size $25mm10$ mm and thickness of $1\mathrm{.}5$ mm has electroding on top and bottom. Assume the piezoelectric material has modulus of elasticity of $65$ GPa $,$ Poisson's ratio of $0\mathrm{.}3$ and electro$-$mechanical coupling coefficient of d$31$ and d$32$ to be $-50{10}^{-12}\frac{m}{V}$ and $200{10}^{-12}\frac{m}{V},$ respectively. Find out the strains in the plate when it is subjected to a voltage of $300$ V and an axial force of $20$ N $.$