Convert the Following Addition Problem into Two's Complement Notation (Using $\begin{array} { r } 6 \\+ 3 \\\hline\end{array}$

Essay

Convert the following addition problem into two's complement notation (using four bits per value),perform the addition,convert the answer back into base ten notation,and explain the results.
$\begin{array} { r } 6 \\+ 3 \\\hline\end{array}$