Refer to the table in Problem 3.8.
In Problem 3.8, the City Commission of Nashville has decided to build a botanical garden and picnic area in the heart of the city for the recreation of its citizens. The precedence table for all the activities required to construct this area successfully is given on the top of this page. Draw the Gantt chart for the whole construction activity.

(a) Draw the AON network for the construction activity.
(b) Draw the AOA network for the constructionactivity.

Time Immediate (in hours) Predecessor(s) Code Activity Description A Planning Find location, determine resource requirements B Purchasing Requisition of lumber and sand C Excavation Dig and grade D Sawing Saw lumber into appropriate sizes E Placement Position lumber in correct locations 20 60 100 30 20 10 20 10 30 None Plannin Planning Purchasing Sawing, excavation Placement Assembly Assembly Infill, outfill F Assembly Nail umber together G Infill H Outfill I Decoration Put grass all over the garden, landscape, paint Put sand in and under the equipment Put dit around the equipment