Part $2$: for the frame shown below, $P=15kN$ and $a=1\mathrm{.}5m,$ Assume $I=20000i{n}^4$ and $E=30,000$

for all beam.

Part $2.$a: Use the virtual work method to calculate vertical deflection of node G$.$

Use the virtual work method to calculate the horizontal deflection of node A$.$