i need help creating a project network diagram from the attached table.

21. Read the following case study and answer the questions that follow. Reactor Unit Refurbishment Project A reactor unit and a storage tank are connected by an insulated pipe that needs periodic replacement. There are valves along the lines and at the connections to the reactor and storage tank and there need to be replaced on well. No pipes and valves are in stock and will need to be procured. Accurate drawings exist and are available. Pipe sections can be fabricated at the plant. Adequate labour is available. You are responsible for this project and you have been requested to submit a plan and schedule for review. The Engineering Department has furnished the following data. The precedents for each activity have been determined from a familiarity with similar projects. Activity Activity Description Time (Days) Precedents A Develop required material list 1 B Procure pipe 25 A C Erect scaffold (supports) 2 D Remove scaffold (supports) 1 H, M E Deactivate line 1 F Prefabricate sections 5 B G Place new pipes 4 F. L H Fit pipe and valves 1 G. K J Procure valves 2B A K Place valves 1 J. L L Remove old pipe and valves 4 C. E Insulate pipes 3 G, K N Pressure test 1 H P Clean-up and start-up 1 D. N NB! Please do not use any Critical Path Analysis software tool such as HIS Project, Scheduler Primavera, etc. to answer the following questions i.e. all exercises and calculations must be gone by "hand" In real life, you will be using a software tool. but you fist need to be able to undentand the basic principles of time analysis and be able to do it without software. Develop the Network Diagram from the data given in the table above and perform a Critical Path Analysis of the developed diagram. Please note that you do not have to send in your drawn and calculated diagram. It is however impossible to answer the questions below if you do not develop and calculate the network diagram. Academy of York is provisionally registered as a Private College with DHET Registration number 2011/FE07/069 Page 20 of 28