Draw the use case diagrams for the following scenarios in MS Visio.

Suppose you are developing an event management system. The event planner can schedule programs that are of two types i.e., shows and events. The event planner may change the floor plan for each event after it is scheduled. Once the shows are scheduled, the event planner sets prices for the shows. The event planner may also add one or more discounts to the set price of the show to try to improve sales.

Customers can purchase seats for scheduled events and shows online through this system. Once they provide the mailing address, they must look up shows and select the seats they want to reserve. Customers should pay only by credit card payments.
After payment, the event management system may generate the payment receipt if the customer wants it.