In the context of construction project management, which of the following statements is/are true:
- A dummy activity will consume time and resources
- The programme evaluation and review technique (PERT) is best suited for projects with large uncertainties in the duration of activities
- A Gantt chart is commonly used for identifying the 'critical path' of activities in a project
- Free float is the amount of time by which the start of an activity can be delayed without causing a delay in the start of a following activity
