1) The table below is a segment of network analysis of a project of both the forward and backward pass but with some missing entries. The network continues after tasks W and the LF assigned there comes from the hard due date.

Task	Predecessors	ES	EF	LS	LF
R	N,Q	44	49
S	R	49	52		60
T	R	49	54		60
U	S,T		60	60
V	U		68
W	V		78		84

a) What is the slack of activity W?

b). Based on a standard network method for calculation and using days as the calendar period for scheduling a task was calculated to have an ES of 22. The project that is being worked on 7 days each week for up to a 28 days and work began (started) on the first day of the month (For example February 1). On which day of the month (the numbered day) would work on this task begin?

c). On application of project network analysis and calculation a task with duration of 8 had a LF of 30 and a slack of -4 (negative 4). What is the ES of this task?