Figure $2$ shows the class relation structure among the classes of a program written in C$++.$ "I" Figure $2$ shows the class relation structure among the classes of a program written in C$++.$ "I"

indicates an Inheritance relation between two classes. $"$AG$"$ represents an aggregation relation

between two class objects, $"$AS$"$ indicates an association relation between two classes. Assume

Class $7$ and Class $1$ are changed. Please follow the class firewall's concept to identify a class

firewall to enclose all affected classes and re$-$integration links after changing Class $7$ and Class $1.$

Please present this class firewall by answering the following questions:

a$)(8\%)$ What is the class test order based on the class diagram in Figure $2.$

b$)(7\%)$ What are the class firewalls for the two changed classes, and please present the two

firewalls separately using a diagram.

c$)(7\%)$ Which classes are not directly affected by each changed class, but must be re$-$

integrated?

d$)(8\%)$ Please list the class re$-$test order for each detected class firewall. Figure $2.$

indicates an Inheritance relation between two classes. $"$AG$"$ represents an aggregation relation

between two class objects, $"$AS$"$ indicates an association relation between two classes. Assume

Class $7$ and Class $1$ are changed. Please follow the class firewall's concept to identify a class

firewall to enclose all affected classes and re$-$integration links after changing Class $7$ and Class $1.$

Please present this class firewall by answering the following questions:

a$)(8\%)$ What is the class test order based on the class diagram in Figure $2.$

b$)(7\%)$ What are the class firewalls for the two changed classes, and please present the two

firewalls separately using a diagram.

c$)(7\%)$ Which classes are not directly affected by each changed class, but must be re$-$

integrated?

d$)(8\%)$ Please list the class re$-$test order for each detected class firewall.