$2$a$.$ Two cables are tied together at $B$ and are loaded as shown in figure $3.$ Determine the tension $($a$)$ in cable $AB,($b$)$ in cable BC$.$

$($LO $1)5$ marks

$2$b$.$ A string ABCDE whose extremity $A$ is fixed has weights $W_1$ and $W_2$ attached to it at $B$ and $C$ as shown in figure $8,$ and passes round a smooth peg at $D$ carrying a weight of $800$ N at free and $E$ in fig. If in a state of equilibrium, $BC$ is horizontal and $AB$ and $CD$ makes an angle of $150$ and $120$ respectively with $BC,$ make calculations for a$)$ the tensions in portions $AB,BC,CD.$ b$)$ Values of weights $W_1$ and $W_2($LO $1)5$ marks