6. Given the following AOA project network:

Given the earliest occurrence times (qE) and the latest occurrence times (qL) for each ith event, answer the following questions:

a. What is the duration of task (1, 3)?

b. What is the duration of task (2, 3)?

c. What is the total slack of task (3,4)?

d. What is the safety slack of task (4, 5)?

e. What is the free slack of task (2, 5)?

f. What is the independent slack of task (2,4)?