A uniform live load of \(300 \mathrm{lb} / \mathrm{ft}\) and a single concentrated live force of \(2 \mathrm{k}\) are to be placed on the floor beams. Determine

(a) the maximum negative shear in panel \(A B\), and

(b) the maximum negative moment at \(B\). Assume the supports at \(A\) and \(E\) are pins and the pipe columns only exert vertical reactions on the beams.

4 ft- -4 ft 4 ft -4 ft 4 ft- A B IC DI E