8. Perform the following additions. Assume that all numbers are in 8-bit 2's complement notation. State the carry-in and carry-out, whether overflow or not, and if the result is correct. a. 11011001 +01011100 b. 01101000+ 00101101 c. 10011001 +10111011 d. 11101101 + 11111001 9. Perform the following subtractions. Assume that all numbers are in 2's complement notation. State the carry-in and carry-out, whether overflow or not, and if the result is correct. a. 110110 - 10110 b. 10110 - 11010 c. 11101101 - 00101010 d. 01111011 - 11000001