Choose between Factory, Facade, Proxy, Singleton and Adapter pattern designs.

II. Assume you are charged for the QNB International Transaction Management System (ITMS) that was developed and supported by a software company called SoffCom which maintains a shared library called 'payment.dII' which is used by ITMS. ITMS was developed in Java. Recently SoftCom has gone out of business without fixing some problems with their class library, 'payment.dII'. QNB bought a new library called 'newBanking.cep' from another company. It provides the same functionalities that ITMS needs, however, the classes in the new library are in different format and implemented in C++. ITMS also does not have access to the source code of 'newBanking.ccp'. ITMS also provides an interface to all other banks so the customers of other banks can create new transactions through this interface. This interface is available from various websites. Customers cannot directly use the core components called 'Transaction' of ITMS. Some bad people sometimes attack ITMS, but they cannot harm much to 'Transactions'. ITMS also maintains an unique 'Counter' object that counts the total transactions. Once a customer of any bank makes a transaction with QNB, the 'Counter' object increments its value by one. The system does not allow more than one 'Counter' object to exist. In the above system, which pattern(s) are you going to use in your design of the software; and for each selected pattern, explain briefly the reason for the selection. (marks: 5% )