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a.) Evaluate ∭w9??? for the region w: ?2+?2≤ ? ≤81. b.) Evaluate ∭we9z?? for the region...

a.) Evaluate ∭w9??? for the region w: ?2+?2≤ ? ≤81.

b.) Evaluate ∭we9z?? for the region w: ?+?+?≤1 , ?≥0 , ?≥0 , ?≥0.

c.) Find the volume of the solid ? in the first octant bounded by ?+?+?=3 and ?+?+4?=3.

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