Jones Machinery specializes in developing weed-harvesting equipment that is used to clear small lakes of weeds. Robert Jones, president of JonesMachinery, is convinced that harvesting weeds is far better than using chemicals to kill weeds. Chemicals cause pollution, and the weeds seem to grow faster after chemicals have been used. George is contemplating the construction of a machine that would harvest weeds on narrow rivers and waterways. The activities that are necessary to build one of these experimental weed-harvesting machines are listed in the accompanying table.
ACTIVITIES IMMEDIATE PREDECESSORS TIME (WEEKS)
A 7 B 5 C A 3 D A 2 E B 4 F B 6 G C, E 11 H D, F 7
a) Construct a network. b) Calculate the project completion time of the critical path.