In this row of six figures the fourth is missing. Which answer figure fills the gap?

Each step the spoke jumps two corners clockwise $(120^{\circ })$ and the hexagon switches between yellow and blue. After the third figure (spoke to the upper-left corner, yellow) comes a blue hexagon with the spoke pointing right; check: two corners further is the lower-left corner on a yellow hexagon, as in the fifth figure: (a).