Problem:

Question 1: What are design classes?

a) Design classes are classes whose specifications have been completed to such a degree that they can be implemented.
b) Design classes are classes whose specifications have been completed to such a degree that they can be programmed.
c) Design classes are classes whose specifications have been completed to such a degree that they can be approved.
d) None of these

Question 2: Artifacts - represent the specifications of real-world things such as:

a) source files
b) design documents
c) test data
d) test results

Give reasoning with your answer.