Question: Question 2b: Let P, Q, and W each be functions from R' to R'. Define f(x, y, z) by Let u = Vf. Part 1:

Question 2b: Let P, Q, and W each be functions from R' to R'. Define f(x, y, z) by Let u = Vf. Part 1: Find u. Part 2: Let S be the upper unit hemisphere in 3D, which is an open surface, with boundary I correponding to the unit circle, parameterized by s. Let T(s) be the tangent to that boundary. So, to be clear, S is the set of all points satisying x2 + y2 + 22 =1, with z 2 0. Find IV xu] . T(s)ds You must explain your

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