1. In Model 4.4, why the Station module is created? Your explanation should be simple and not more than three sentences.

2. Based on the report from Model 4.4 (Adding Entity Travel Times), referring to the Queue section, what is the difference between Waiting Time and Number Waiting. Your explanation should be simple and not more than two sentences.

Create Call Arrivals Record Attempted Call Trunk Line Available? Seize Trunk Line Increment Active Call Counter Store for Initial Recording Delay Initial Recording Delay Unstore from Initial Recording Delay False Record Rejected Dispose of Rejected Call Call Calls Arrive Assign Tech Call Entity Type and Picture Store for Tech Call Recording Delay Tech Call Recording Delay Unstore from Tech Call Recording Delay Create Arrival Cutoff Entity Cut Off Incoming Calls Dispose of Arrival Cutoff Entity 0 0 Determine Call Type Arrival Cutoff Logical Entity 76 16 Else Process Product Type 1 Tech Call Determine Product Type 0 25 34 Else Process Product Type 2 Tech Call Process Product Type 3 Tech Call Tech Support Calls Assign Sales Cal Entity Type and Picture Process Sales Call Release Trunk Line Decrement Active Call Counter Record Completed Calls Dispose of Call Entity 0 Sales Calls 0 No Sales Person Required? Delay True Assign Order Status Entity Type and Picture TRIN 2.3.41 False Set Order Status Call Priority Order Status Call Seizes Sales Person Delay for Order Status Conversation With Sales Person Order Status Call Releases Sales Person Order Status Calls