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Problem. 13 : Evaluate the integral by converting to polar coordinates. 12 x2 + y dy da ?Problem. 9: The figure shows the region of Integration for the Integral Rewrite this Integral as an equivalent Iterated Integral In five other orders. (Assume y(2) - ,/I and z(y) - 6 - y.) ((I, y, z) dz da dy ((z, V. = ) da dy dz ((I, W. =) da dady f(r, W. 2) dy dr dz f(z, W. z) dy da dxProblem. 10: Express the Integral /(z, y, z) dV as an licrated Integral In six different ways, where I is the solid bounded by the given surfaces. 7- I 2- 0, and y | 23 - 4. /ry. z) dz dy dr f(r, V. 2) dz dr dy f(x, y. z) da da dy f(x, y. z) dx dy dz f(r, v. z) dy da dx L W 2 /(s, y. z) dy dx daProblem. 7: Find the volume of the solid in the first octant bounded by the parabolic cylinder z = 4 - x2 and the plane y = 6. ? units