Let (Y = (0, 2]) and
(R) is the set of all real numbers. Which of the following specifications of
(Y) are correct? 1) a) (Y = {x in mathbb{R}: 0 < x leq 2}) 2) b) (Y = {x in mathbb{R}: 0 leq x < 2}) 3) c) (Y = {x in mathbb{R}: 0 < x < 2}) 4) d) (Y = {x in mathbb{R}: 0 leq x leq 2})