Q4. addCustomers (customer_list, add_list): takes as argument the customer_list and another list of customers [name1,clerk,minute, , nameN,clerk,minute], and adds them to the list. The name, desk, and time for each customer in add_list are separated by comma (,) without any space. This action should modify the customer_list in-place. If the add_list is empty such as [], then print Nothing to add..