A project consists of five activities.Naturally,the paint mixing precedes the painting activities.Also,both ceiling painting and floor sanding must be done prior to floor buffing. 
a.Construct the PERT/CPM network for this problem.
b.What is the expected completion time of this project?
c.What is the probability that the project can be completed within nine hours?
Definitions:
Biased Estimator
A statistical estimator that does not generate parameter estimates with long-run average values equal to the true population parameter.
Sample Statistic
A numerical measure that describes an aspect of a sample.
Population Parameter
A numerical value summarizing a characteristic of an entire population.
Point Estimate
A single value given as an estimate of a population parameter, derived from sample data.
Q6: The Fitness Shop is considering ordering a
Q11: Island Water Sports provides rental equipment and
Q13: Gradual shifting of a time series to
Q17: For an M/M/1 queuing system,if the service
Q25: In a two-person,zero-sum,pure-strategy game,it can be advantageous
Q33: Zip Games purchases blank DVD disks onto
Q34: If a problem has multiple goals at
Q42: Find the complete optimal solution to this
Q44: A basic feasible solution also satisfies the
Q47: When the value of the output cannot