Q$2($SOpoy$)$ A$)$ An engineering project is being plataned using Project Network Techuiques, and the precedence diagram withched as Figare $1$ has boen perpared to show the seyaence of logic. The duration of each activity is shown in the stadard postices quoted in weeks.

a$)$ Ceenglete the precedence diagram by adding the fall analyis of star and finish times $($EST$,$ EIT, LST$,$ LFT$)$ and tocal float in the appropriale places. Decide the Total Project lime$.(20$ pts $)$

b$)$ Indicate the critical path on the diagram. Explain your docision, why? Explain the importance of the critical path $(10$ pes$)$

D$)$ By using the information given in Figurel, prepare a table indicating activity aame, daration and predocessors$($s$)$ for each activity. Draw Activity$-$on$-$Arow $($A$-$o$-$A$)(20$ pts$)($Use the empty pleces, no extra answer paperl$)$ Fugure $1,$ Precedence Diggram

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