The following addition and subtraction operations are to be carried out with $8-$bit $2\text{'}$s complement numbers.

For each operation, calculate the result and label as OVERFLOW or CORRECT

Example: $1+2=0$b$00000001+0$b$00000010=0$b$00000011=3,$ CORRECT

a$.64+64=?$

b$.-127+30=?$

c$.-127-1=?$

d$.38-40=?$