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4. Arrow diagram is a network diagramming technique in which activities are represented by arrows. It was defined as a tool used to determine optimal sequence of events. The activities in the Table 6 describe the construction of a new house. Analyze and construct an Arrow Diagram. Table 6: Activity construction of a new house. A Activity Predecessor(s) Duration (day) A B D E F G H 1 J K L M N O P Q R S T Clear site Bring utilities to site Excavate Pour foundation Outside plumbing Frame house Do electric wiring Lay floor Lay roof Inside plumbing Shingling Outside sheathing insulation Install windows and outside doors Do brick work Insulate walls and ceiling Cover walls and ceiling Insulate roof Finish interior Finish exterior Landscape A C B, C D F G F E, H 1 F, J F L, M GJ O I, P P I, N S 1 2 1 2 6 10 3 1 1 5 2 1 2 4 2 2 1 7 7 3 (Total: 20 )