QuestionConsider the following piecewise-defined function. $$f(x)=\left\{\begin{array}{ll} 7^{-x-4}-3 & \text { If } x<-4 \\ \frac{-36}{x+8}+7 & \text { if } x>-4 \end{array}\right.$$
Step 3 of 3 : Evaluate this function at $x=-6$. Write the exact answer. Do not round. If the answer is undefined, write Und as your answer. $$f(-6)=\square$$