[1] Consider a two-dimensional region defined by intersecting regions of the inequalities Y > 0, Y 3x, Y -X + 4, for 0 x 2, and let fx,y (x, y) = c. [a] Given fx,y(x, y) = c, what must c be for this density to be valid? [b] Find the marginal pdfs for both X and Y [c] Determine the density of fy|x=1.75-