Find the Volume of the solid

under the plane x-2y+z=1 and

above the region bounded by x+y=1 and x^2+y=1.

Here is the link to the GeoGebra graph: https://www.geogebra.org/3d/kputg9n3

Double Integrals over General Regions.

Double Integral by first reversing the order of integration.

Calculate the iterated integral by first reversing the order of integration.