Below is a continuous beam. The system carries a dead load wd $=4ki\frac{p}{f}t,$ with a MOVING distributed live load $wL=10ki\frac{p}{f}t$ and a MOVING concentrated live load PL $=20$ kip.

First construct the influence line for the support reaction at $E$ in the beam.

A$)$Construct the influence line for the shear force at $D$ in the beam. In the influence line for the shear force at $D,$ what is the positive and negative value at $D[kip-ft]?$

B$)$ Construct the influence line for the bending moment at $C$ in the beam. In the influence line for the bending moment at $C,$ what is the value $C$ and $A[$kip$-$ft$]?$

C$)$ what is the maximum and minimum support reaction at point $E$ in $[$kip$]?$Using the constructed influence lines

D$)$ what is the maximum and minimum bending moment at point $C$ in $[$kip$-$ft$]?$ Using the constructed influence lines

E$)$ what is the maximum and minimum shear at point $D$ in $[$kip$]?$Using the constructed influence lines