Using an Arrow Diagramming Method, please draw a network diagram with the values of ES, EF, LS, LF and Float. Also identify the critical path and total duration of the project. Activity ABCDEFOHLS Activity list for the Daugherty Porta-Vac Project Description R&D product design Plan market research Routing (manufacturing engineering) Build prototype model Prepare marketing brochure Cost estimates (industrial engineering) Preliminary product testing Market survey Pricing and forecast report Final report Immediate Predecessors Duration 4 7 ACDAHE B. E F. G. I 6 15 1931271