Merkitse puuttuva luku.

a. [[$0, \dfrac{1}{6}, $]] [[$ \dfrac{2}{6}, $]] [[$ \dfrac{3}{6}, $]] [[$ \dfrac{4}{6}, $]] [[$, 1$]]

b. [[$0, \dfrac{1}{7}, $]] [[$ \dfrac{2}{7}, $]] [[$ \dfrac{3}{7}, $]] [[$, \dfrac{5}{7}, $]] [[$ \dfrac{6}{7}, 1$]]