$2-$ Draw the influence lines for the following quantities. Show values at critical points.

a$)$ Reaction force at support $C(10$ points$)$

b$)$ Shear in internal hinge B $(10$ points$)$

c$)$ Reaction force at support A $(10$ points$)$

d$)$ Reaction moment at support A$(10$ points$)$

Evaluate the maximum positive and negative moments at support A caused by the following load conditions:

Uniform dead load $D=2\mathrm{.}5\frac{K}{f}t$

Uniform live load $L=3\mathrm{.}0\frac{K}{f}t$

Concentrated live load $=80$Kips

An impact load ratio $=25\%$

Maximum positive moment at support $A=(10$ points$)$

Maximum negative moment at support $A=$

$(10$ points$)$