Which of these sentences represents $$x P$($x$),$ where P$($x$)$ is the statement that x has more than $1$ GB RAM and the domain is all the computers at a university?

Multiple select question.

Some of the computers at the university have more than $1$ GB RAM.

There is a computer at the university that has more than $1$ GB RAM.

All the computers at the university have more than $1$ GB RAM.

There is at least one computer at the university with more than $1$ GB RAM.