Determine the vertical deflection at joint B$.$ The cross$-$sectional area of each member is $6i{n}^2$ Assume the members are pin connected at their end points. The members are constructed of structural steel $(E=29,000$ksi $).$ Use the method of virtual work. $(60$ marks$)$

$20$kips

$\backslash$table$[[$Member$,n(k),N(k),L(ft),nNL(k^2*ft)$

Member AF$,$ FC $,$ ED are $14$ft $2$ inches in length

Member AB$,$AC$,$CD$,$FE$,$BF$,$EC are $10$ft in length

Solve for deflection at joint B