Consider the function$f ( x ) = \frac { 2 } { 7 - x }$.

1. What is $f\left(7\right)$?

   Answer (a):

   Undefined

2. What is the domain of $f\left(x\right)$?

   Answer (b):

   $x ≠ 7$

3. If $g\left(x\right)=2x+5$, what is $g\left(3\right)$?

   Answer (c):

   $11$

4. Now use the output of $g\left(3\right)$ as the input for $f$ to calculate $f\left(g\left(3\right)\right)$.

   Hint (d):

   Substitute the value of $g\left(3\right)$ for $x$ in $f\left(x\right)$.