A signed number was converted to binary and stored in an $8$ bit memory location. Given the binary signed number below is the value stored in memory, find the equivalent signed decimal number it represent for each of the following signed number representations: Don't forget to include the sign in your answer

$10010101$

Decimal equivalent if was stored in Sign Magnitude Notation:

Decimal equivalent if was stored in $1\text{'}$s Complement Notation

Decimal equivalent if was stored in $2\text{'}$s Complement Notation: