According to the use case diagram for coffee vending machine. Please use the same drawings for the activity and sequence diagrams and update it by adding the missing object "administrator". Use drawing tool not by hand.

Good luck

The use case diagram has 4 actors and one system.

- Coffee vending machine system

- Customer

- Maintenance employee

- Admin

- Bank

In the squence diagram and the activity diagram are missing the admin actor. Add it to both diagrams and do the correct changes.

Customer Maintenance employee Administrator System Buy item Recharge item Check item Setup machine include> condude> Choose item Pay by coins Pay by credit card Dispense item Verify coins Verify transaction Bank Phase Customer Buy item selects payment method inserts card enters pin collects items By credit car Coffee Vending Machine System Coffee VM select items from list display the payment methods By coins valid invalid insufficient coins dispense items Maintenance Employee available check the item Not available Recharge item valid Bank invalid eject card Customer request()- -showitems() choositem()- ----payment Method- payByCoins()- -verify()- insertCard()- ---dispenseltem() --ejectCard() Coffee vending machine -checkitem()- ------availablitiy()-- Maintenace message()- -verify()- Bank