Develop (i) a context diagram, and (ii) a use case diagram to model the following functionalities of an online brokerage house.

eBroker is a discount online broker. An account holder of this brokerage firm can check the balance in his account, get stock quote, buy stocks or mutual funds, sell stocks or mutual funds, or research about a stock or a mutual fund. The account holder should log in to the site using his username and password before he can do any of the above functions. For buying or selling stocks, the user provides the number of stocks to buy or sell and the price. For mutual funds, the user provides only the total amount. After a buy or a sell transaction is completed, the system sends a confirmation to the account holder's email address. At the end of every month, the system sends an account statement to every account holder by email. The system sends a hard copy account statement to the account holder's home address also, if the account holder had requested so.