Show that $\displaystyle x_{n+2} = f_{c} (x_n) $ is a 6 cycle using $\displaystyle x_{-1} $ and $\displaystyle x_{0} = q$ as initial values.

I'm guesing that $\displaystyle x_5 $ should equal p and $\displaystyle x_6$ should equal q.

But I dont know how to start it off....Any help would be great.