The chief surveyor of a firm that moves earth in preparation for the construction of roads has identified the

activities and their durations for each stage of an operation to prepare a difficult stretch of motorway as

shown in the following table. The surveyor needs to know how long the project will take and which are the

critical activities.

Road construction activities

Activity Duration $($days$)$ Preceding activity

A $5-$

B $10-$

C $1-$

D $8$ B

E $10$ B

F $9$ B

G $3$ A$,$D

H $7$ A$,$D

I $4$ F

J $3$ F

K $5$ C$,$J

L $8$ H$,$E$,$I,K

M $4$ C$,$J

i$.$ Using the information given in the table prepare a Gantt chart $($using Microsoft projects$),$ and

draw a network diagram.

ii$.$ What is the end date if the start date is $25$ October $2023,$ taking into consideration that Sundays

are non$-$working days?

iii. What is the effect of B slipping by $3$ days?