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(HINT for 9.56: use ϸ = 11.6×10°mm*,ỹ = 44.9mm,ϸ = 11.6×10⁰ mm*, x = 44.9mm, A=5420mm² for the L152x 152 x 19 shape). PROBLEM 9.56 A channel and an angle are welded to an a × 20-mm steel plate. Knowing that the centroidal y axis is located as shown, determine (a) the width a, L152 x 152 x 19.0 (b) the moments of inertia with respect to the centroidal x and y axes. C150 x 15.6- 20 mm