a$.$ What is a use case diagram? Create a use case diagram for any one of the

scenarios mentioned below. Please use the actors mentioned in the brackets.

i$.$ Bank ATM machine $($administrator$,$ bank customer$)$

ii$.$ Travel agency $($travel agent, customer$)$

iii. Restaurant $($server$,$ cashier, customer, chef$)$

Please consider include, extend and generalization relationships. Keep the diagram as

specific as possible and explain your diagram

b$.$ Create a class diagram for your choice above. Explain briefly about a class diagram

and your choices for designing your class diagram.