Determine the number at which the function is discontinuous, and show why definition 1.8.1 isnt satisfied at this number

Def 1.8.1

1.)$\displaystyle f(a)$ exists

2.)$\displaystyle \lim_{x \to a}$ exists

3.)$\displaystyle \lim_{x \to a} = f(a)$

$\displaystyle 12.)H(x) =$

$\displaystyle 6 + x$if$\displaystyle x \leq -2$

$\displaystyle 2 - x$if$\displaystyle -2 < x \leq 2$

$\displaystyle 2x - 1$if$\displaystyle 2 < x$

sorry and thanks very much for your help