Which of the following formulas is used to compute the earliest start time of an activity, Ay?
Max{Earliest completion time(Ax)} where Ax is all activities providing input to Ay.
Min{Earliest start time(Ax)} where Ax is all activities providing input to Ay.
Min{Earliest completion time(Ax)} where Ax is all activities providing input to Ay.
Max{Earliest start time(Ax)} where Ax is all activities providing input to Ay.