Question 5 [8 Marks] (Long Answer Question) File Upload Required A model created by an engineer is represented by the following multivariable functions w = zey T = s't, y = thu, z = su (a) Find Or dy Oz ar dy Oz (b) Find as ' as' as leaving your answers as expressions in terms of s, t, and u. (c) Find at ' at ' at leaving your answers as expressions in terms of s, t, and u. (d) Find Or dy Oz au' au' du leaving your answers as expressions in terms of s, t, and u. aw (e) Find the values of when s = -1, t = -2, u = 2