The middle column indicates 0 if the star doesn't have a planet, and 1 if it does.
Parts 1-8 will be due Monday. Continue on to problems 9 if you feel particularly inspired to learn about how to deal with measurement uncertainties when doing this sort of analysis.
Part 10 instructs you to write up your results. This is left over from last year. This year I've already encouraged you to make your results clear, either in an iPython workbook or better yet a LaTeX document. You may turn in your completed activity the same way you did with CA1 and CA2.