Question: The vector field F is shown in the xy-plane and looks the same in all other horizontal planes. (In other words, F is indepen- dent

The vector field F is shown in the xy-plane and looks the same in all other horizontal planes. (In other words, F is indepen- dent of z and its z-component is 0.)
(a) Is div F positive, negative, or zero? Explain.
(b) Determine whether curl F = 0. If not, in which direction does curl F point?

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