13. -/1 points SCALCET8 14.5.509.XP. If z = f(x, y), where f is differentiable, and x = g(t) 9(7) = 3 y = h(t) h(7) = 4 g'(7) = -9 fx(3, 4) = 8 h'(7) = -6 fy(3, 4) = -5 find dz/dt when t = 7. dz dt Need Help? Read It Watch It Talk to a Tutor 14. -/2 points V SCALCET8 14.5.510.XP. Let W(s, t) = F(u(s, t), v(s, t)), where F, u, and v are differentiable, and the following applies. u(1, 1) = 0 v(1,-1)=-7 Us(1, 1) = -3 Vs(1, -1) =-6 ut(1, 1) =4 Vt(1, -1)=-8 Fv(0, -7) = -5 Fu(0, -7) =-4 Find Ws(1, -1) and W(1, -1). Ws(1, -1) = W(1,-1)= Need Help? Read It Talk to a Tutor