Very challenging Absolute value question

[crak.gmat]

If a<y<z<b, is |y-a| < |y-b| ?

1. |z-a| < |z-b|
2. |y-a| < |z-b|

Explanation appreciated.

[Ian Stewart]

I posted an explanation here:

www.beatthegmat.com/absolute-value-t13290.html