OBS and WBS daimantion scedcule like the example

Case study This case study is for a small 3 houses project. The main segments of a single house, the responsibilities, and the logical relationship are identified as follows: 11 work packages are involved: A and B (civil work, substructure), C, D, E, and F (civil work, superstructure), G (electrical, interior), H (electrical, exterior), ! (mechanical, HVAC), J (mechanical, elevator), and K (mechanical, plumbing). Substructure is supervised by Ahmed (activity A), and Ali (activity B). Superstructure is supervised by Hossam (activities C and F) and Mona activities D and E). All electrical work is supervised by George. HVAC and plumbing are supervised by Adam; elevator work is supervised by Samy - Activities E and F follow activity B. - Activity precedes activity G. - Activity I follows the completion of activity E. The predecessors to activity K are activities H and I. - Activity D follows activity A and precedes activity H. - Activity J is preceded by activities F and G. It is required to create a WBS and OBS chart Part 2: Time Management WBS and organizational breakdown structure (OBS): The WBS elements at various levels can be related to the contractor's organizational breakdown structure (OBS), which defines the different responsibility levels and their appropriate reporting needs as shown in Figure below. WBS (Work elements) Project Area 1 Area 2 Area 3 Beams Columns Slabs Formwork) Reinforcement Concreting Subcontractor B Control account OBS (Responsibility & reporting) Project manager foreman Formwork Concrete foreman General contractor Subcontacter A Electrical Civil superintendent superintendent superintendent Mechanical Rebur foreman