QUESTION $2[30$ MARKS$]$

A grade S$355$JR steel beam is required to support the loads as shown in Figure $2.$ Lateral support to the compression flange will be provided at the position of the point loads, and the supports may be restrained against torsion. Initial calculations have shown that A $45719198$ I$-$section is adequate. Ignoring the self$-$weight of the beam. Do the following:

$2\mathrm{.}1$ Draw the shear force and bending moment diagrams showing all critical values. $(7)$

$2\mathrm{.}2$ Check shear and flexure on the critical segment B$-$C$.(23)$

Please help ASAP