The following three ply glass fiber/ epoxy configuration [0/45/90], is subjected to a load (stress resultants) of Nx = Ny =1200 N/m. (each ply has fiber volume fraction of 0.6) Note that (Nxy=0 N/m and Mx-My=Mxy=0 N) z = -7.5 mm 90 5 mm z = -2.5 mm 45 5 mm z = 2.5 mm 0 5 mm z = 7.5 mm 8. Calculate the extensional, coupling and bending stiffness matrices. 9. Calculate the midplane strains and bending curvatures. 10. Calculate the global strains on top surface of 45 ply. 11. Calculate the global stresses on top surface of 45 ply 12. Calculate the local strains on top surface of 45 ply. 13. Calculate the local stresses on top surface of 45 ply.