ARE you able (to)?
Do you mean famous or infamous? For the former, you need some talent; for the latter, you need no scruples.
its poo
can, could, will do, capable
Depends on who's asking. Sometimes you can turn it into a question that you can answer, and sometimes you can decline to answer. You might not respond the same to a reporter as to a judge; to your...
The closest approximation is "poder." It's also translated as "can" as in "can do."