Statically Determinate Frame

For the frame shown below, assume all members are AISC W$18$x$50.$ P$1=20kN,P2=40kN$ and $P3=20kN.$ The length parameter a is $2m.$

Part $1.$a: By hand calculation, solve the reaction forces, and develop the shear force and moment diagram for the frame. $(20\%)$

LENGTHS ARE AS FOLLOWS:

DA$=3$a $->6$m

FB$=2$a $->4$m

HC$=$a $->2$m

DE$=$EF$=$FG$=$GH$=2$a $->4$m