STEP BY STEP SOLUTION

P$2$: $($a$)$ Draw the influence lines for reactions RB$,$ RD$,$ and RF of the beam in shown and the shear and moment at E$.($b$)$ Assuming that the span can be loaded with a $1\mathrm{.}2$kip$\frac{s}{f}t$ uniform load of variable length, determine the maximum positive and negative values of the reactions.