A mis sobrinas les gusta tocar la guitarra.
This is talking in plural form. Also, jugar means to play (like playing with toys,), but in this case you would say tocar. In English play can mean different things, but you need to remember when to use each.
Answer:
Mama trabaja en una librería
Explanation:
Las fuerzas armadas mexicaas armaron el ejercito frances el Cinco de Mayo.
