Q$3.)$ The cable supports a uniform load of $800\frac{N}{m}.$ The lowest point of the cable is $0\mathrm{.}12$ m below points $C$ and $D.$ The cable is supported by a truss on either side made of three truss members. Determine the axial loads in truss members $DF$ and $DE$ and state whether each member is in tension or compression. Supports A and $F$ are pin supports and $B$ and $E$ are roller supports.