¿dónde están cristina y bruno? ¿dónde están la profesora y el estudiante? ¿dónde está la puerta? ¿dónde está la mochila? ¿dónde está el pasajero? ¿dónde está josé miguel means "Where are cristina and bruno? Where are the teacher and the student? Where is the door? Where is the backpack Where is the passenger? Where is Jose Miguel"
I believe it is el because pedro and hermano are masculine.
Yes you should worry about this semesters grades. It depends on your school system honestly. And you shouldn’t have to worry if you know you have all your credits for your classes. You should speak with your guidance counselor