0 used to say that something is less than or equal to but not more than a stated value, number, or level: --
1 until: --
2 to be the responsibility of someone: --
3 to be doing something, often something bad or illegal, usually secretly: --
4 less than or equal to, but not more than, a stated value, number, level, or time: --
5 being the responsibility of (someone): --
If it were up to me, I’d do it.
The decision is up to you.