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1. Suppose that at some point in a fluid, the Cartesian molecular stress tensor (consisting of both isotropic pressure and deviatoric viscous components) is given by 1 T=- p1 +u (vv+v+) = 4 4 4 -4 -2 -2. 1 (a) Evaluate the molecular stress vector at point O for a test surface that is normal to the x- axis. Find the stress exerted by the fluid on the +x side of the surface. [1 marks] (b) Evaluate the pressure, p, acting at point O for a test surface that is normal to the y-axis. Assume the flow is incompressible. [1 marks) (c) Now, obtain the viscous stress tensor acting at point O for a test surface that is normal to the y-axis. [1 marks)