Answer:
Both April and Wayne
Step-by-step explanation:
As per common law, principal is a person who designates another person to establish legal relationship with a third party on behalf of him. The person who acts on behalf of the principal is called an agent.
In this case, Steve acts on behalf of April and enter into a contract with Wanda who acts on behalf of Wayne. So, April and Wayne are principals and Steve and Wanda are agents.