Which of the following statements relating to negotiation are incorrect?

There are always at least two parties present in any negotiation process.

Negotiation occurs when parties prefer to search for an agreement rather than openly fight.

Negotiation takes place when there are no established set rules for resolving the conflict, or the parties prefer to work outside of an established set of rules to reach a solution.

The negotiation process isn't always voluntary and a contract of agreement should be signed.

The bargaining phase is the last stage of the negotiation process.

The preparation phase is the first stage of the negotiation process.