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Systems Software (P) Ltd. is planning to develop new software. It has identified the

activities in the table below for this software development project and has calculatedthree time estimates in days for each of the activity.

Activity Description PredecessorsOptimistic

time

Most likely

time

Pessimistic

time

A Create objectives - 1 2 3

B Choose Operatin system A 3 ! "

C #enerate alorithm A $ 1% 1&

DChoose a s'itable

proramminA & $ (

) *rite the proramme B+ C+ D ( , 1%

.est the so/t0are ) 2 & $

##et approval /or

commercialiation 1 3 !

Dra0 the net0ork diaram /ind o't the critical path and the epected d'ration o/ the

project4

Calc'late the slack time /or each o/ the activities4

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Calc'late the probability o/ completin the project in 3% days4