Let J be the solid enclosed by the xy-plane, yz-plane, and the planes x + 2y + z = 4, and x − y + z = 4. Suppose that th

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Let J be the solid enclosed by the xy-plane, yz-plane, and
the planes x + 2y + z = 4, and x − y + z = 4. Suppose that the
density at each point P(x,y,z) ∈ J is the distance of P from
the yz-plane.
1. Sketch the solid J.
2. Set up a single iterated triple integral in rectangular
coordinates that gives the mass of J. Do not evaluate the
integral.