Writing: capital letters

hi! my name is carlos.
1. Hi! My name is carlos.
2. hi! my name is Carlos.
3. Hi! My name is Carlos.
4. Hi! My Name is Carlos.
i'm from barcelona, in spain.
1. i'm from Barcelona, in Spain.
2. I'm from Barcelona, in Spain.
3. i'm from barcelona, in Spain
4. I'm from Barcelona, in spain
In catalonia we speak catalan and castilian.
1. In Catalonia we speak catalan and castilian.
2. in Catalonia we speak Catalan and Castilian.
3. In Catalonia we Speak Catalan and Castilian.
4. In Catalonia we speak Catalan and Castilian.
in july, it's very hot in my barcelona.
1. In july, it's very hot in Barcelona.
2. In July, it's very hot in Barcelona.
3. In July, It's very hot in Barcelona.
4. In july, it's very Hot in Barcelona.
on fridays i go out with my friends.
1. On fridays i go out with my friends.
2. On Fridays I go out with my friends.
3. On Fridays I go out with my Friends.
4. On Fridays I go out with my friends.