Question $8(2\mathrm{.}20$ textbook page $51)$

The following binary numbers are four$-$bit $2\text{'}$s complement binary numbers. Which of the following operations generates overflow? Justify your answer by translating the operands and results into decimals $($show your process of computing the number$).$

a$.1100+0011$

b$.1100+0100$

c$.0111+0001$

d$.1000-0001-8-1=-9$

e$.0111+1001,7-9=2$