please show steps

Problem 10. ( 20 POINTS) 3) 2 X 4 WHICH MEASURE 5" X 3.5" EACH DETERMINE THE DIMENSION y FOR THE PLYWOOD BOX BEAM N.A. FIGURE SHOWN. E PLYWOOD SHEETS AT SIDES WHICH MEASURE EXACTLY (/2" THICK EACH y 1) 2 X 4 WHICH MEASURES y 5" X 35" Problem 11. ( 20 POINTS) DETERMINE THE DIMENSION y FOR THE "WOOD I" BEAM FIGURE SHOWN. (2) 2 X 6 WHICH MEASURE 15 " X 5.511 N.A. y PLYWOOD SHEET WHICH IS EXACTLY 1/2" THICK y 2) 2 X 4 WHICH MEASURE 5" X 3.5 "