xyz =f(x,y,z) = z2 Suppose you follow the spiral path C: x = cos t, y = sin t, and z=t, for t2 0, through the domain of the function w = + 1 Complete parts (a) and (b) below. a. Find w(t) along C. b. Estimate the point (x, y, z) on Cat which w has its maximum value.