Develop (i) a context diagram and (ii) a use case diagram to model the following functionalities of NetFlix.

Netflix is an online video/DVD renting company. A customer desiring to use the Netflix service should first become a member by providing information such as name, address, phone number, and credit card data. The member also creates a user name and password. A member uses this user name and password to log in subsequently. A member can perform one of two functions. First, he/she can edit a list of DVDs in his/her account. The list can have a maximum of thirty rank ordered movies. The member can add a new DVD to the list in any position within the list, delete a DVD from the list, or change the rank ordering within the list. Second, the member can check the status of a DVD in his/her list. The status can be not shipped, in process of being shipped, shipped, or returned. Netflix ships out the DVD with the highest rank immediately after receiving a DVD back from the member. Whenever Netflix ships or receives a DVD, it updates the list. A member can have a maximum of three DVDs at a time. At the end of each month, Netflix charges the customer's credit card a rental fee for the month. 

Make reasonable assumptions, if required.