$1.$ Which sentences are true?

a$)$ CheckingAccount implements BankAccount

b$)$ CheckingAccount and SavingAccount are BankAccount

c$)$ CheckingAccount and SavingAccount are associated

d$)$ BankAccount is associated to CheckingAccount

e$)$ SavingAccount can processCheck

f$)$ CheckingAccount has a balance

Answer:

$2.$ Write code to implement the class diagram. Write a sequence diagram to create a possible Main$()$ to verify the implementations.