Calculate the following signed number additions in binary by using $2$s complement

form.

a$)-115+(-75)$

b$)-187+(+33)$

c$)+98+(+41)$

d$)+26+(-66)$

Calculate the $2$s complement representations of the following negative decimal assuming all numbers are stored in $8$ bit registers.

a$)-101$

b$)-187$

c$)-98$

d$)-230$