A team of programmers describes the objects and functions in a program that compresses files...

The Waterfall Model is a sequential design process used in software development, where progress is seen as flowing steadily downwards through several phases like a waterfall. In the context of the question, describing the objects and functions in a program that compresses files before splitting the objects involves two specific phases:

Design Phase: This is where the system’s architecture, components, interfaces, and data are all defined. The team would design the objects and functions necessary for the file compression program during this phase.

Implementation (or Development) Phase: Following the design, the actual code is written during the implementation phase. The objects and functions described in the design phase are created and tested to ensure they work as intended.

These two phases are critical in the Waterfall approach for transitioning from an abstract understanding of the problem to a concrete implementation in code. The analysis phase is more about understanding the problem and requirements, while testing is a separate phase that comes after implementation.