For the truss shown in Figure $5\mathrm{.}1,$

a$)$ Calculate the forces in members GH EH and DE using METHOD of JOINTS. Write all your working in the answer pages provided $($pages $20-21)$

b$)$ Calculate the forces in members JI$,$ LI and JL using METHOD of SECTIONS. Write all your working in the answer space provided. $($pages $22-23)$

Clearly indicate whether the members are in tension $($positive$)$ or compression $($negative$).$