i need a discussion for this 2 cases and an answer for the other question plz help me

1-¿A offers B to sell 1000 organic eggs for $350. B, accepts this offer. The delivery should take place on August 9, 2012. On the 5th of August, A dies on a car accident.¿ Is there a valid contract (offer)? Discuss. 2- ¿John wants to enter into advertisement business. He has no idea about types of business organisations. But one thing he knows for sure: He does not want any partners?¿ Which business type/types can/cannot he choose? Discuss. 3-Which of the intellectual property rights fall under distinctive signs? Explain briefly.