Validity of fast

1)If one did not know that masturbating breaks the fast and thinking masturbating is Makrooh, continues the fast till maghrib time is the fast valid( fasting all day)?

2) if thinking that the fast is makroooh and not having knowledge that masturbating will break the fast, will the fast be valid?

3)if one did not know that masturbating breaks the fast and masturbated without knowing is the fast valid?

4)is it valid if one did unintentionally as did not know that the fast would break? if one masturbated thinking it was makrooh but that it will not break the fast, will the fast be valid?

Jazakallah