2.Determine the reactions at the supports of each given structure. a) The beam is supported by a roller at A and C, and by a pin at D. There is

a hinge connection at B. The external moment is applied at C. (25 pts.) b) The beam is supported by a roller at A and a pin at B. A distributed and a concentrated load are acting on the beam. (23 pts.) c) In addition to support reactions calculate the internal forces at B as well. Members are pin connected at A, B and D, and there is a fixed-connected joint at C. (30 pts.)