22.17 A(n) __________
consists of an object of one class sending a message to an object of another class.
a) association
b) aggregation
c) collaboration
d) composition
22.18 Which form of interaction diagram emphasizes what collaborations occur? Which form emphasizes when collaborations occur?
22.19 Create a sequence diagram that models the interactions among objects in the ATM system that occur when a Deposit
executes successfully, and explain the sequence of messages modeled by the diagram.