Discussion 2 Computer Organization 1. There are three ways in which signed binary numbers may be expressed: o Signed magnitude, o One’s complement, and o Two’s complement. Explain why the third way is the best of them at all, followed by the second one. 2. Check digits, appended to the end of a long number can provide some protection against data input errors. Longer data streams require more economical and sophisticated error detection mechanisms. What we mean by the word “economical”?