(4) Draw a diagram showing the layers (including fiber orientation for each ply) for the following composites and indicate what entries of stiffness matrix are zero and whether the laminate is balanced or quasi-isotropic (each layer has the same thickness) (15') All A12 A16 B1 B2 B16] A12 A22 A26 B2 B22B26 A16 A2 A B16 B6 Bo B1 B2 B16 D1 D2 D16 B12 By By Diz D22 D ( B16 By B D16 D D a. [452/-452/30] b. [0/45/90]s c. [+45/90]s d. [30/60/-60/-30] e. [0/45/90/-45] (4) Draw a diagram showing the layers (including fiber orientation for each ply) for the following composites and indicate what entries of stiffness matrix are zero and whether the laminate is balanced or quasi-isotropic (each layer has the same thickness) (15') All A12 A16 B1 B2 B16] A12 A22 A26 B2 B22B26 A16 A2 A B16 B6 Bo B1 B2 B16 D1 D2 D16 B12 By By Diz D22 D ( B16 By B D16 D D a. [452/-452/30] b. [0/45/90]s c. [+45/90]s d. [30/60/-60/-30] e. [0/45/90/-45]