3. a) Show that the shear stress, =(v+(v)T)+(32)(v), simplifies to the form below (Table B.1) for an incompressible fluid in 3D Cartesian coordiantno. xx=[2xvx]yy=[2yvy]zz=[2zvz]xy=yy=[xvy+yvx]yx=zy=[yvz+zvy]xx=xz=[zvy+xvz] b) Show that =2v for an incompressible fluid in 3D Cartesian coordinates