Write the appropriate $-$ definition for the statement. $\underset{xa}{lim}f(x)=N$ For every $>0,$ there exists a $>0,$ so that if $0<|x-N|<$ then $|f(x)-a|<.$ For every $>0,$ there exists a $>0,$ so that if $0<|x-a|<$ then $|f(x)-a|<.$ For every $>0,$ there exists a $>0,$ so that if $0<|x-a|<$ then $|f(x)-N|<.$ For every