(1 point) Suppose z = tan- 1x x = u cos(5u) , and y = u sin(5u) . Compute Oz/du and Oz/du in two different ways: Find Oz/ox and Oz/dy as functions of u and U. Oz/Ox = azloy = Now use your answers above to find Oz/du and Oz/du using the chain rule. Oz/du = Oz/du = Write z as a function of u and v. Z = Now use your answer above to find Oz/du and Oz/du directly. Oz/du = Oz/au = Use your answers above to find Oz/du and Oz/du at (u, U) = (1/9, 1/4). oz au |(u,v)=(7/9,/4) Oz au (u,v)=(7/9,z/4) =