2) The fundamental equation of a particular substance is given as a second-order response surface, namely: U - 200 +505 -0.31 +0.852 -0.0041 -0.03SV a) Determine the equations for the properties, T, P, H, A and G in terms of the variable U, S, V. b) Plot the surface U(S,V) for the ranges 10 s S s 30 and 100 s V s 300