BOOK LINK: https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-042j-mathematics-for-computer-science-fall-2010/readings/MIT6_042JF10_chap02.pdf

3. Write the steps that the book outlines in section 2.3.2 for a proof by contrapositive. 4. Prove by contrapositive that the reciprocal of a non-zero rational number is also rational. In your proof, label each of the steps