$*6-20.$ The compound beam is subjected to a uniform dead load of $1\mathrm{.}5k\frac{N}{m}$ and a single live load of $10$ kN $.$ Determine $($a$)$ the maximum negative moment created by these loads at $A,$ and $($b$)$ the maximum positive shear at $B.$ Assume $A$ is a fixed support, $B$ is a pin, and $C$ is a roller.

Prob. $6-20$

$**$Pleaee Clearly LIST and EXPLAIN Each Step$**$