4. The boom supports the two vertical loads, F1 and F2 and if 7F₁ = 16F2 and F2 = 700 N. Neglect the size of the collars at D and B and the thickness of the boom, and compute the horizontal and vertical components of force at the pin A and the force in cable CB. A 1.5 m 30° B 1 m D F2