Specific liability of principals to third parties

Question 1

When is a principal liable for contracts that agent enters on their behalf? Two requirements

Answer 1

1) when principle authorized agent to enter into K and

2) agent acted with legal authority

Question 2

Four types of legal authority

Answer 2

1) actual express authority
2) actual implied authority
3) apparent authority
4) ratification

Question 3

Difference between actual authority and apparent authority?

Answer 3

ACTUAL: principal communicates with agent

APPARENT: principal communicates with third party