Let L(x,y) be the statement "x lives with y", where the domain for both x and y is all people.
use the quantifiers (∀,∃) to express the following statement
(1) Someone lives with exactly two people.
(2) There is somebody who lives with somebody.
(3) There is somebody whom no one lives with.
PS: I think "There is somebody who lives with somebody" is same with "somebody live with somebody". ∃x ∃y L(x,y), Is it right?