Please explain the drawing

Instructions Draw a use case diagram for the following streaming media subscription system: When members sign up for the streaming service, they pay a fee for a certain length of time. Most subscriptions are for one year, but some could be on a monthly basis. Throughout the year, the streaming service offers a variety of discounts on regular subscription prices (e.g., sign up a friend and get a month free). This means its common for subscribers to pay different amounts for the same length of membership. The streaming service wants to send out email reminders to subscribers asking them to renew their subscriptions one month before it expires. Some subscribers have become angry when asked to renew at a much higher rate than they originally paid, so the service wants to track the prices paid so the manager can override regular prices with special prices at renewal time. The system must track these new prices so the renewals can be processed accurately. The streaming service is new and afraid of losing users, so the manager wants the system to track each time a subscriber views content. The system will then identify the heavy users and generate a report so they can be asked to renew their subscriptions early, perhaps at a reduced rate for renewing early. Likewise, the system should identify members who have not logged in for more than a month, so they can be called in an attempt to reinterest them in the streaming content available on the service