Estimating activity time is not an easy task, especially if assumptions must be made. State whether each item identified below can be accounted for in the construction of a PERT/CPM network: a. Consideration of weather conditions b. Consideration of weekend activities c. Unleveled manpower requirements d. Checking of resource allocations e. Variable crew size f. Splitting (or interrupting) of activities g. Assignment of unused resources h. Accounting for project priorities