$1\mathrm{.}1.$ Evaluate the value of expression $[6$A$1$a$1/$L$1],$ in kN$.$m$^2,$ representing the contribution of the uniformly loaded and concentrated load acting on the span, ab$,$ to the three$-$moment equation of the two$-$span beam.

$1\mathrm{.}2.$ Evaluate the value of expression $[6$A$2$b$2/$L$2],$ in kN$.$m$^2,$ representing the contribution of the triangular distributed load acting on the span, cb$,$ to the three$-$moment equation of the two$-$span beam.

$1\mathrm{.}3.$ Compute the bending moment, in N$.$m$,$ at section across point b$.$