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What is the volume of the unit ball in R3 with coordinates (r, θ, h), where...

What is the volume of the unit ball in R3 with coordinates (r, θ, h), where x = r cos θ, y = r sin θ, z = h? Show your work and do not skip any steps. Then, find the volume of the unit ball in Rn, applying mathematical induction on n and the Fubini theorem.

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