Situation $1$: $($Nos$.1-3)$ A space truss is subjected into a various load as shown in the figure.

Determine the force in member $CD.$

A$.0$

C$.1\mathrm{.}14kN$

B$.3\mathrm{.}64kn$

D$.2\mathrm{.}31kN$

Determine the force in member $ED.$

F$.0$

C$.1\mathrm{.}14kN$

B$.3\mathrm{.}64kN$

D$.2\mathrm{.}31kn$

Determine the force in member $CF.$

F$.0$

C$.1\mathrm{.}14kN$

B$.3\mathrm{.}64kN$

D$.2\mathrm{.}31kN$