Hello, I am getting confused by the concepts. I don't know how to figure these two questions out properly. Could you please explain the correct answers for me?

Thank you so much!

Question A)

Shrek and Princess Fiona plan to marry in six months. Several fairytale characters [e.g.. Donkey. Puss in Boots, Dragon, Gingerbread Man [yes...the Gingerbread Man). Big Bad Wolf, Three Little Pigs) have chartered a luxury bus to the Kingdom of Far FarAwayto attend the wedding celebration. The bus driver's fee is 1500; the bus rental is 4500, for which a 500 deposit has been made; the fuel charge is 2000, which is paid ifand only if the trip occurs. The driver's fee is nonrefundable. The bus rental can be cancelled up to one month in advance but the deposit is forfeited. At 100 per bus ticket. how many fairytale characters must purchase luxury bus tickets more than one month in advance so that the bus trip will go on as scheduled? 045 C360 O65 Q75 030 Which of the following considerations is the most predictive determinant of long-run economic profit: O Supply and demand conditions O The distribution of costs among firms O The magnitude of entry barriers The extent of product differentiation