The following data is shown below:

ActivityIDImmediate Predecessors

Optimistic

Time (o)

Most Likely

Time (m)

Pessimistic

Time (p)

Start-----Plan detail expansion of pig pensA-123Acquire laborers to construct pig pensB-223Purchase construction materials for constructionCA444Erect two new water storage tanksDB234Implement pig pen construction worksED101320Monitor and control quality of construction activities.FE,D6812End construction activitiesGF123Document all project records and lessons learntHG234END-H---

Draw a project schedule network diagram to determine the critical path and project duration.

a.

Duration is 38 days and critical path is AEFGH

b.

Duration is 32 days and critical path is ACEFGH

c.

Duration is 37 days and critical path is ACDEFGH

d.

Duration is 35 days and critical path is ABCEFGH