For the system illustrated below, $1$ kN vertical concentrated load moves through points $D-$ABB$-E.$ Answer the followings.

a$)$ Plot the influence line diagrams of the support reactions $V_A,V_B,$ and $V_C.$

b$)$ Plot the influence line diagrams of $M_1,T_1$ and $M_2,T_2$ internal forces.

c$)$ Plot the influence line diagrams of the truss forces at $S_1,S_2,S_3,S_4,S_5$ and $S_6.$

d$)$ For the illustrated moving load pattern below, calculate the maximum and minimum values of $T_1,T_2,M_1$ and $M_2$ highlighted at sections $(1)$ and $(2).$

e$)$ Use the same moving load pattern given in part $($d$)$ to calculate the maximum values of the tensile and compressive truss forces at $S_1,S_2,S_3,S_4,S_5$ and $S_6.$

$=2.$

$=c$

$=$