Consider the task of installing a computerised system. The following table shows theactivities,timesandsequencesrequiredtoaccomplishthetask

Activity	to	tm	tp
1-2	2	4	12
1-3	2	4	25
2-11	1	1	5
3-4	1	3	6
3-5	1	4	9
3-6	2	5	12
3-7	2	3	5
4-8	4	6	14
5-12	3	6	9

6-9	4	6	10
7-10	4	5	7
8-11	2	4	6
9-12	1	2	4
10-12	1	4	8
11-12	3	4	11

Required:-

1. Drawanetworktorepresenttheabovedata
2. Determinethe criticalpathoftheprojectandtheexpectedprojectlength