Question: What decimal value does the 8-bit binary number 00010001 have if: a) It is interpreted as an unsigned number? b) It is on a computer

What decimal value does the 8-bit binary number 00010001 have if: a) It is interpreted as an unsigned number? b) It is on a computer using signed-magnitude representation? c) It is on a computer using ones complement representation? 175 d) It is on a computer using twos complement representation? e) It is on a computer using excess-127 representation? I found the answer here but I feel like that is not correct cause it is giving same answer for questions a. b. c. Can somebody post the right answer please?

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