Transform the following vectors into spherical coordinates and

Transform the following vectors into spherical coordinates and

Transform the following vectors into spherical coordinates and then evaluate them at the indicated points:
(a) A = xy2 + yxz + z4 at P1 (1 – 1, 2),
(b) B = y(x2 + y2 + z2) – z (x2 + y2) at P2 (- 1, 0, 2),
(c) C = r cos ??????sin ??z cos ?sin ??at P3 (2, ??4, 2), and
(d) D = xy2 / x2 + y2) – yx2 / (x2 + y2) + z4 at P4 (1, – 1, 2).

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