For the Function $y = \frac { 2 ^ { 2 / x } } { x }$

Essay

For the function $y = \frac { 2 ^ { 2 / x } } { x }$ , ( $x < 0$ ), use a graphing calculator to find, correct to two decimal places,
(a) the intervals on which the function is increasing or decreasing, and
(b) the range of the function.