Draw 1) a context data flow diagram (level-0) and 2) a level-1 diagram for cash withdrawal process for ATM:

When a customer wishes to withdraw cash at an ATM, he or she must insert a debit cart and enter password. The ATM verifies card information and password based on customer information saved in a customer file, and displays menu options in which customer can enter the amount of cash he or she wishes to withdraw. Once the customer enters the amount, the ATM checks the fund available in the customers account based on data stored in an account file. The ATM dispatches the cash, and prints a receipt also using and updating the data stored in the account file.