Hello Miss

This is writting to get some iformation please
I have Residecy larga duracion (validity 05 Years). My question is

1. How much time I can live outside spain
a) Regularly 01year, 02 year or 03 year, how much?
b) Partially live 06 month outside spain and come back, Then next year 06 month again come back
(In short every year I have to come back or can live regularly).
c) For Nationality how much time required to spend in spain.

2. If i change its status Larga duracion E.C., Then i shift in other european country I do work at there

a) when my residency expire after spending 05 year in other EUROPEAN country can I apply for nationality in spain?

Thanks & awaiting