Given the code fragment:

You have been asked to define the ProductCodeclass. The definition of the ProductCodeclass must allow c1instantiation to succeed and cause a compilation error on c2instantiation.
Which definition of ProductCodemeets the requirement?

Given:

What is the result?

Given the class definitions:

And the code fragment of the main() method,

What is the result?

Given the code fragment:

What is the result?

Given that version.txtis accessible and contains:
1234567890
and given the code fragment:

What is the result?