2) A 13-bit Hamming code containing 9 bits of data and 4 parity bits is read from memory. What is the original 9-bit data word that was written into memory if the 13-bit data read out is as follows: a) 0111001010100 b) 1010100111010 c) 0000100010101 6) A logic circuit is required to add 4 to a four-bit binary number only if the number is less than 8. Otherwise, the output must be equal to the input. In other words, SA+4 A+4 for A