$($Prob $9-3)$ Determine the reactions at the supports, then draw the moment diagram, and determine

the slope at point $B.$ The moment of inertia for each segment is shown in the figure. Assume A and

$C$ are rollers and $B$ is a pin. Take $E=200$GPa and I as shown in the figure. Length A $=5$ m

Length B $=7$ m

I A $=1116(10^6)$ mm

I B $=2075(10^6)$ mm $(20\%)$

Figure $1$