An engineering project is being planned use Project Network Techniques, and the precedence diagram attached as figure $1$ has been prepared to show the sequence of logic $.$ the duration of each activity is shown in the standard position $,$ quoted in weeks $.$

a$)$ Complete the precedence diagram by adding to full analysis of start and finish times $($EST$,$ BET, LST$.$

LFT$)$ and local in the appropriate place. decide the Total Project time. $(20$ pes$)$

b$)$ indicate the critical path on the diagram, explain your decision, why? explain the importance of the critical path.

B$)$ By using the information given in Figure $1,$ prepare, a table indicating activity name, duration and

predaceous for each activity. Draw Activity on$-$Arrow $($A$-$o$-$A$)$: $(20$ pos$)($Use the empty places, no extra answer paper$)$ figure $1.$

precedence Diagram

Start

$2$

$4$

$4$

$10$

$60$

$90$

$13|$

$100$

$2$

$6$

$80$

$30$

$|3|$

$-50$

$6$

$6$

$20$

$70$

$40$

$2$

ANSWER. i need correct answer please