Answer:
Ellas talking about a group of girls
El talking about a boy
Nosotros talking about myself and my friends
Yo talking about myself
Tu talking directly to my best friend?
They are the same. 1 Panamanian Balboa is equal in value to the US dollar. This changed throughout history but never too much. You can however still use regular US dollars to pay for things in Panama and the merchants won't bother you about it. This is because of historical events and colonization and freedom of panama and it's relations with the US.
Son las diez cincuenta de la noche
son las once y media de la noche
son las una cuarenta y cinco de la tarde
son las tres veinte y cinco de la tarde
