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Exercise #1: 

* 9210 + C123


    9210
  + C123
  ------
   15333

  - Carry bit: set (there will be a leftover carry)

  - Overflow bit: set (both numbers are <0 but result is >0)

  - Sign extension will produce 00005333, so output will be 21299


* 2100 + 7033

    2100
   +7033
   -----
    9133        

	
  - Carry bit: not set

  - Overflow bit: set (both bumbers are >0 but result is <0)

  - Sign extension will produce FFFF9133, so output will be -28365


* B5 + 25

    B5
   +25
   ---
    DA 

  - Carry bit: not set

  - Overflow bit: not set (>0 + <0 never overflows)

  - Sign extension will produce FFFFFFD4, so output will be -38


* E1 + D4

   E1
  +D4
  ---
  1B5         

  - Carry bit: set
 
  - Overflow bit: not set (<0 + <0 is <0, all is well)

  - Sign extension will produce FFFFFFB5, so output will be -75


* FF + FF

   F2
  +8F
  ---
  181         

  - Carry bit: set
 
  - Overflow bit: not set (<0 + <0 is <0, all is well)

  - Sign extension will produce FFFFFF81, so output will be -127