a$)$ Explain the differences between isotropic, anisotropic, orthotropic, and transverselyisotropic materials.b$)$ Give specific examples of materials that behave as isotropic, anisotropic, orthotropic,and transversely isotropic materials.c$)$ Write the stiffness matrix for isotropic, anisotropic, orthotropic, and transverselyisotropic materials. Clearly show the non$-$zero components, and identify the numberof independent elastic constants each of these materials have.