How Do You Sketch x[2n] from a Discrete Signal?

[Huumah]

Discrete signal x[n] is shown in the first picture. Sketch x[2n]

Answer

Can anyone ecplain why x[2n] is like that. I can understand how to plot it if i have a continuous time signal

 

[rude man]

On the second picture's x axis, n = 2n of the first picture's x axis.