Software Engineering

I'm trying to finish this assignment, but I'm extremely confused. Will rate for help, thanks!

1. Given the following use case diagram, a. draw the context diagram (10 Points) b. Data Flow Diagram of this system (15 Points) C. Pick two of the use cases and create System Analysis use case from them (20 points each for 40 points) Travel Agency Booka tour extend> Airline Company Book artikel Reserve a se Travel Agency Delvere Arrange tour pay travel agent Puy foraine Touring Company Customer Travel agmt Commission Pay for tour a. create a use case diagram for the system (20 points) b. pick one of the use cases, and create a system analysis use case from it (15 points) Pending Order Order PL Inventory Control Department Pro Picking sos Back Ordered in Record Puding Onder Customer Order Pende Order Customer Prepare Shipping Warehouse Customer Information Custom Shipping Dustam Record Record Add Com Record 01 Customer Slipped Order Customer and Custom Record Customer Pendine Order Pending Order Day in Customer Elling Statement Produce Receivable Customer Number or Description Information ADOS Receivable Report Customer Accounting Department