I. // Let I = (7x + 14y²) dA where D D is the region between y = 3x- and y = 12. a) Sketch the region D very neatly. (Find the points of intersection and include their coordinates in your picture.) b) Integrate I with respect to y first and then x. c) Integrate I with respect to x first and then y.

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A: As per our guideline, we are supposed to solve only first question. Kindly repost other question as…

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