Given the function $f ( x ) = \mathrm { e } ^ { x } - a ( x + 2 )$ . (1) When $a = 1$ , discuss the monotonicity of $f ( x )$ ; (2) If $f ( x )$ has two zeros, find the range of values for $a$ .
Given the function $f ( x ) = \mathrm { e } ^ { x } - a ( x + 2 )$ .
(1) When $a = 1$ , discuss the monotonicity of $f ( x )$ ;
(2) If $f ( x )$ has two zeros, find the range of values for $a$ .