Vector a lies in the yz plane 68.0° from the positive direction of the y axis, has a positive z component, and has magnitude 3.70 m. Vector b lies in the xz plane 39.0° from the positive direction of the x axis, has a positive z component, and has magnitude 2.10 m. Find (c) the y-component of a x7, (d) the z-component of a xb, and (e) the angle between a and b.

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