$4.$Fill in the table given to add the two unsigned $($B$2$U$)4$ bit values below $($Op$1$ and Op$2),$ which have been converted to binary. Be sure to show all carries $($no matter whether they are $1$ or $0)$ and all sum bits.

Carry $($Last carry$)$

Op$10101$

Op$20111$

Sum

a$.$Is there overflow for this result $($put an X in one box$)?$

ANSWER: $[]$ Yes $[]$ No

b$.$How did you determine the answer to part a$.$ above $($explain how the hardware adder indicates whether there is overflow or not$)?$

ANSWER: