Problem 1 (40 points): A beam is suspended from a sloped roof. This beam will carry a projector camera with a mass m=70kg. The gravitational acceleration is g=9,81m/s2. Where should this mass be placed on the beam AC such that the elongations of the suspension cable AB and the suspension cable CD are equal and the beam stays horizontal after the placement of the mass? The length of the cable AB is 2m long. Ignore the width of the mass and mass of the beam AC. The modulus of elasticity of the bars which are made of plastic composites are E=10GPa. The cross-section areas of the bars are A=1cm2 each