The following activities, their precedents and durations have been identified for the implementation phase of a project. Activity Preceding Activity Duration (days) AHardware selection - 6 BEvaluation of suitable packages A 10 CDesign bespoke software - 4 DInstall the hardware A 2 EPurchase the packages B 1 FCoding bespoke software C 6 GConversion of old data D 5 HUser manual - 6 IUser training F,G 1 JInstall and test E,I,H 2 (a)Draw a network diagram for the project. (b)What is the minimum time in which the project can be completed? Which are the critical activities