Scheduling a project. Need to identify the activities for intermediate predecessor's. (For critical path method)

A. Remove all furniture, flooring, doors, boilers, windows B. Demolition (of all walls as required by new plan) C. Rewiring D. Plastering E. New Kitchen including all appliances (with tiled splashbacks) F./ New Fully Tiled Bathroom (including bath, separate shower and toilet) G. Painting H. New Engineered Oak Flooring Throughout 1.New oak skirting boards J. New door surrounds throughout K. Seven new internal oak doors L. Install New boiler M. Install New central Heating system N. Replacement Upvc windows and cleaning (cleaning the window or cleaning what!??) O. New furniture Activity Intermediate Predecessors Duration (days) A 1 B 8 10 4 28 14 8 14 2 1 13 3 0 2 3