f(x, y) = x2 + y2, g(t) = (t, 1/t), at the point to = 2. f(s, t) = (es cost, es sint), while g(x) = (et, Inx) at the point x0 = 1.For each of problems 1-5, find the differentials of f and g at the relevant points, and use these to determine the differential of the composite h = f(g(x) ) at the given point To