Final answer:
Under Nebraska agency laws, brokers must inform parties like a seller, buyer, landlord, or tenant of their fiduciary duties but not typically competitors, such as other brokerage firms.
Step-by-step explanation:
The question pertains to the Nebraska laws of agency, which dictate the fiduciary responsibilities that a brokerage firm owes to various parties. Under these laws, a broker must disclose the firm's fiduciary duties to clients, which commonly include a seller, buyer, landlord, or tenant with whom the broker has established an agency relationship. However, the broker is not typically required to inform competitors, such as other brokers or real estate firms, about the specifics of their fiduciary responsibilities.