Interpretatoion of Binary Numbers
---------------------------------

a) 10011001

   Positive Integer:
   =128+16+8+1
   =143

   2's Complement:
   10011001-1
   =10011000
   inverted= 01100111
   =64+32+4+2+1
   =103
   or 10011001 = -103

   BCD:
   =1001  1001
   =99

   BC Hexadecimal:
   =99

b) 1001
   +ve=9 (if considered unsigned)
   2's Comp=-7 
   BCD=9 (only one digit can be specified)
   BCHex=9 (only one digit can be specified)

c) 0001 0001 0001
   +ve=273
   2's Comp=does not rep any -ve number. For 2's Comp Left bits cannot be zeros.
   BCD=111
   BCH=111

d)  0111 0111
    +ve=119
    2's Comp=does not rep any -ve. Left bit cant be zero.
    BCD=77
    BCH=77

e) 01010101
   +ve=85
   2's Comp=does not rep any -ve
   BCD=55
   BCH=55

f) 100000010101
   +ve=2069
   2's Comp=2027
   BCD=815
   BCH=815