Let $f(x)=\frac{1}{3-2x},$

$($a$)(5$ pts$)$ Using a limit definition of the derivative, find $f^{\text{'}}(a).($you must use a limit definition of the derivative to find $f^{\text{'}}(a)$ er you will get no credit$)$

$($b$)(2$ pts$)$ Using any method you wish, find the line which is tangent to $f$ at $(1,1).$