Evaluate ∭ E
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3xzdV where E={(x,y,z)∣2≤x≤3,x≤y≤2x,0 ​
zdV, where E is the solid tetrahedron with vertices (0,0,0), (2,0,0),(0,3,0), and (0,0,4). Round your answer to four decimal places. Evaluate ∭ E
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(x+y−2z)dV where E={(x,y,z)∣−4≤y≤0,0≤x≤y,0 } Round your answer to four decimal places.