Make BPMN MODEL:Blue Mountain Ski Resort is a ski resort that provides skiing and snowboarding services. They pride themselves on the quality of their trails, equipment rentals, and ski lessons. Customers may visit the resort to purchase lift tickets, rent equipment, and sign up for ski lessons. The process instance is triggered when a customer arrives at the resort to purchase lift tickets. The participants in this process include the Customer as well as Blue Mountain Ski Resort's Ticket Salesperson, Rental Attendant, and Ski Instructor. The process proceeds as follows: 1. The Customer arrives at Blue Mountain Ski Resort and is greeted by the Ticket Salesperson. 2. The Customer proceeds to purchase lift tickets from the Ticket Salesperson. 3. The Ticket Salesperson informs the Customer about the rental equipment and ski lessons available at the resort. 4. The Customer decides to rent equipment and proceeds to the Rental Attendant. 5. The Rental Attendant measures the Customer's feet and provides the appropriate ski boots, skis, and poles. 6. The Rental Attendant asks the Customer if they want to purchase a helmet or other rental equipment, such as a snowboard or snowshoes. 7. The Customer either agrees or declines to purchase additional rental equipment. 7.1. If the Customer agrees, the Rental Attendant provides the additional rental equipment and adds the appropriate charges to the final bill. 7.2. If the Customer declines, the Rental Attendant finalizes the rental transaction. 8. The Customer proceeds to a designated area to put on their equipment. 9. The Customer may sign up for ski lessons at this point by visiting the Ski Instructor. 10. If the Customer decides to sign up for ski lessons, the Ski Instructor provides an overview of the different types of lessons and recommends a lesson based on the Customer's skill level. 11. The Customer agrees to the lesson and the Ski Instructor schedules the lesson and adds the appropriate charges to the final bill. 12. The Customer attends the ski lesson and learns new skiing techniques from the Ski Instructor. 13. After the lesson is complete, the Customer returns their rental equipment to the Rental Attendant and proceeds to the Ticket Salesperson to pay the final bill. 14. The Customer pays the bill and leaves the resort with their personal belongings. 15. At any point, the Customer or any of the resort staff may terminate the service. If the service is terminated before completion, the customer would be required to pay for any services that have already been provided by the resort, and the remaining balance would be refunded.