Select all that apply

What are the different ways by which a negotiator can obtain information about the other party's needs and interests? $($Select all that apply.$)$

Multiple select question.

By analyzing the way in which the other party portrays itself in the media

By analyzing his or her own needs and interests

By interrogating others who are familiar with the other party

By anticipating the interests of the other party

By conducting a discussion in order to understand what the other party seeks to achieve