its earliest finish time and earliest start time for its successor activity
its latest start time and earliest start time
its latest finish time and earliest start time for its successor activity
its earliest finish time and latest start time for its successor activity
is always longest
is always shortest
may be longest
may be shortest
preceding activities
succeeding activities
the particular activity involved
none of the above
15 minutes
20.143 minutes
21 minutes
27 minutes
81
54
36
9
