Discuss these questions:

4. What comprises a partner's contribution in a contract of partnership? 5. Can a partner contribute "credit" to the partnership? 6. Explain the sharing of profits as an essential feature of partnership? 7. What are the formalities required in constituting a partnership? 8. Explain the different kinds of partners. 9. If two persons agree to form a partnership in the future, does the partnership immediately arise from the moment of said agreement? 10. What is the purpose of registration with office of the Securities and Exchange Commission as provided in Article 1772? 11. Is an unregistered partnership valid? 12. Does an association which is not lawfully organized as a partnership possess legal capacity to sue