The graph below is the function $\backslash ($ f$($x$)\backslash )$

Determine the following values. Enter "DNE" if a value does not exist, enter $"$oo$"($lower case $"")$ if the limit approaches positive infinity, or $"-$oo$"$ if the limit approaches negative infinity.

$\backslash ($ f$($x$)\backslash )$ has an infinity discontinuity at

$\backslash ($ f$($x$)\backslash )$ has jump discontinuity at

$\backslash ($ f$($x$)\backslash )$ has a removable discontinuity at