Complete answer please

Prepare a PERT/CPM network. Determine critical path and the expected time for completing the project (Activity Analysis and Event Analysis).

Project Plan - Building a house St. No Life Cycle Activities Code Predecessor Duration days) 1 Initiation Defining scope A 7 2 Initiation Approvals from authorities B A 10 3 A ON 6 Initiation Getting builder's warranty insurance Initiation Quoting fees D AB Planning Designing house D 21 m Planning Estimating costs based on the design Planning Risk analysis m 10 Planning Site soil condition check E 3 9 30 Planning Procurement of the material/ equipment 10 20 Planning Hiring equipment quoting green materials and their specifications 11 Planning Construction site layout 12 Planning L K 5 demolition/removal of crosting shrubs, trees, stones, etc 13 Planning M L Excavate foundation, excavate for water treatment plant excavate for bio compost tank 14 Execution Trench work N N 15 Execution Pest/Termite treatment pre slab O M 3 16 Execution P o 1 Concrete casting foundation concrete casting-water treatment plant concrete casting compost tank 17 Execution 14 day curing O P 34 18 R o 1 19 Execution Ground slab casting Execution 14-day curing Execution pest/Termite treatment posts lab S R 34 20 T 5 21 Execution Building retaining walis U T 22 Execution Backfilling V U 1 23 Execution Framework w V 7 24 w 30 Execution Door/Window allocation Execution Installing wooden panels indoors and windows 25 AI X 26 Execution Erecting roof Y X 27 z 30 Execution Installing special building components 28 Execution Carpentry AA N 30 29 Execution Electrician AB 2 32 30 Execution HVAC AC AB 31