A building has the following RC framing plan shown. Slab thickness is to be $249mm.$ All beams are $367mm$ by $708mm.$ Use unit weight of concrete as $23\mathrm{.}5k\frac{N}{m^3}.$

$x=3\mathrm{.}4m$

$y=5\mathrm{.}5m$

$z=9\mathrm{.}8m$

Assume the following loads:

Ceiling load $=2\mathrm{.}40$kPa

Floor finish $=2\mathrm{.}40$kPa

Floor live load $=4\mathrm{.}74$kPa

Calculate the reaction carried by $B-3$ in $kN.$ Answer in $2$ decimal places only

Also, in your solution draw the shear and moment diagram of B$-3$