A project network is shown below.Use a forward and a backward pass to determine the critical path,and then fill out the table below.Activity times are in weeks. 
Now assume that the times listed are only the expected times instead of being fixed times.Is the probability of being finished in more than 28 weeks more or less than 50%?
Definitions:
Russell Simmons
An American entrepreneur and record executive, co-founder of the hip-hop music label Def Jam Recordings.
Narcolepsy
A long-standing disorder that causes significant daytime fatigue and sudden onset of sleep.
Irresistible Urge
A compelling, often uncontrollable desire to perform an act, frequently associated with obsessive-compulsive disorder.
Episodes
Events or sequences of events that are significant enough to be remembered or notable in a narrative or series.
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