A wooden beam is loaded by a distributed load w = 5 N/mm as shown in Figure Q4(a). The cross-section of the beam is shown in Figure Q4(b). Assume that LAB = 1600 mm, LBC = 3400 mm, W=190 mm, Bo = 20 mm, and H = 200 mm, ho=40 mm. Units: use N, mm, MPa as consistent units for all calculations. Decimal points: any decimal points are fine and all the numerical questions have a 10% error tolerance. (a) (b) W hol Bo H B C LAB LBC 7717 Cross-section T W Figure Q4: (a) A wooden beam is loaded by a distributed load, (b) cross-section of the beam.a) Determine the 2d moment of area of this cross-section in Figure Q4(b)? 1 = mm+ Area moment of inertia Write down the mathematical formula to calculate the final 2nd moment of area for this cross-section: I =b) Calculate support reactions in A and C, remember the sign of the force. Reaction force at point A: x-direction: X A= N, y-direction: YA= N Reaction force at point C: x-direction: Xc= N, y-direction: Yc= N