Final answer:
The capital of Wisconsin, known as the city of four lakes, is Madison, and all four lakes are linked by the Yahara River.
Step-by-step explanation:
The capital of Wisconsin, known as the city of four lakes, is Madison. It includes Lake Kegonsa and all four lakes, which are Mendota, Monona, Waubesa, and Kegonsa, are linked by the Yahara River.