please answer these questions

1. What decimal value does the 8-bit binary number 10110100 have if: A. It is interpreted as an unsigned number. B. It is on a computer using signedmagnitude representation. C. It is on a computer using one's complement representation. D. It is on a computer using two's complement representation. E. It is on a computer using excess- 127 representation. 2. Show how the following floating-point values 12.5 would be stored using IEEE754 single precision (be sure to indicate the sign bit, the exponent, and the significand fields) 3. Suppose we are working with an errorcorrecting code that will allow all single-bit errors to be corrected for memory words of length 7. We have already calculated that we need 4 check bits, and the length of all code words will be 11 . Code words are created according to the Hamming Algorithm presented in the text. We now receive the following code word: 10101011110 Assuming even parity, is this a legal code tt, according to our error-correcting code, e error