Final answer:
Usability tests for a WebApp should be designed and executed by intended users.
Step-by-step explanation:
Usability tests for a given WebApp should be designed and executed by the intended users. This is because the ultimate goal of usability testing is to ensure that the WebApp is user-friendly and meets the needs and expectations of its intended audience. If the tests are not conducted by the intended users, the results may not accurately reflect their experience and preferences.