az and az Use a chain rule to find the values of dr Ir=12, 0=x/6 Ir=12, 0=n/6 if z = xye"/v, x = r cos 0, and y =r sin 0. NOTE: Enter the exact answers. dz ar Ir=12, 0=n/6 dz 20 Ir=12, 0=n/6

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