1. What is the definition of BPMN? What is used for?
2. Assume there is attorney who offers legal advice to customers. Customers can ask for legal advice whenever they need it. The attorney provides the requested advice and puts the billable hours on the customer's time sheet. When the month is over, the attorney's accountant determines the billable hours based on the time sheet and creates the invoice.
   1. Use BPMN to draw model the above problem. Hence, the legal advice may be performed many times per month. The Monthly Invoicing process is only performed once a month. (Hint: consider starting with a legal advice request and ending by providing an invoice to customers).
   2. Would you model legal advice and invoicing processes in separate pools? Why/why not?