a. When asked to prove that the difference of any irrational number and any rational number is irrational, a student began, Suppose not. That is, suppose the difference of any irrational number and any rational number is rational. What is wrong with beginning the proof in this way? (Hint: Review the answer to exercise 11 in Section 3.2.) b. Prove that the difference of any irrational number and any rational number is irrational.

STAT 113 Mixable Assignment Political Surveys 60 points total Big picture: You will need to post a comparison of one political survey question asked by two separate surveys. The topic needs to relate to an election, but it can be about a hot topic related to the election (like the economy, terrorism, immigration, whether polls/the media are biased, etc.) or about the candidates themselves. It does not have to be about the current election—past elections are ok, too. The two surveys should be different by organization asking the questions, date of the surveys, survey methods, etc. You cannot use the same question/survey combination as any other student in your class. You also must make 4 statistically intelligent