Consider two integers in the hexadecimal number system: $D=(18C)$ and $E=(AE).$

a$.$ Translate each one into its corresponding BCD and Octal number notation.

b$.$ Add D and E in BCD format.

c$.$ Add $D$ and $E$ in Octal format.

$2\text{'}$s complement method is best suited for binary arithmetic operations. Justify your answer