Find the volume below the surface z = x2 + y2 and above the xy-plane for −1 ≤ x ≤ 1,−1 ≤ y ≤ 1. (b) Find the volume above the surface z = x2 + y2 and below the plane z = 2 for −1 ≤ x ≤ 1, −1 ≤ y ≤ 1

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