Final answer:
Dave Fletcher can determine ES, EF, LS, LF, and slack for each activity by knowing the activity times for constructing his laser scanning machine. The total project completion time can be calculated by adding up the duration of all the activities.
Step-by-step explanation:
In order to determine ES, EF, LS, LF, and slack for each activity, Dave Fletcher needs to know the activity times for constructing his laser scanning machine. These times indicate the duration of each activity in the project. With this information, Dave can then calculate the Early Start (ES) and Early Finish (EF) times, as well as the Late Start (LS) and Late Finish (LF) times for each activity. The slack for each activity can be found by taking the difference between the LS and ES, or the difference between the LF and EF. Finally, the total project completion time can be determined by adding up the duration of all the activities.