5. -/3.33 points SCalc7 14.5.012. Use the Chain Rule to find az/as and az/at. z = tan(u/v), u = 9s + 5t, v = 5s 9t - Əz Os дг at || || Let W(s, t) = F(u(s, t), v(s, t)), where F, u, and v are differentiable, and the following applies. v(-5, -9)=-7 6. -13.33 points SCalc7 14.5.014. 7. u(-5, -9) = -8 Us(-5, -9) = 5 Vs(-5, -9) = 0 ut-5, -9)=2 v-5, -9)=-1 Fu(-8, -7)= 9 F(-8, 7) 1 = Find Ws(-5, -9) and W-5, -9). Ws(-5, -9) = = Wt(-5, -9) = -/3.33 points SCalc7 14.5.021. Use the Chain Rule to find the indicated partial derivatives. z = x + x²y, Oz, dz Os 7 дг at อน x = s + 2tu, y = stu²; when s = 5, t = 4, u = 2 || Oz at az ди = =