Determine the magnitudes of the moments M1, M2, and M3 so that the resultant couple moment is zero

For the beam structure shown below, both C and E are rollers, support A is pinned. El is constant within the structure. (1) Determine the degree of indeterminacy of the structure. (2) Choose appropriate redundant(s), then apply the Force Method to calculate reaction forces at all supports. (3) Draw shear and moment diagrams of the beam (4) Apply the Conjugate Beam Method to calculate the vertical deflection at point B. -12 ft- 30 k ↓ B H -12 ft- -12 ft- E = 29,000 ksi I = 1,500 in.4 30 k ↓ D -12 ft-