Vaughn and Xi are not partners in Wind Systems because they do not have joint control over the business.
A partner is a person who shares in the profit and loss of a business. A partner is also involved in the running of the business.
A partner is sometimes needed because one person might not have the knowledge and know how of running a business. Also, a partner might be needed to raise enough capital for the business.
To learn more about partners, please check: https://brainly.com/question/22693552