Finding Rotational Inertia with Thin Rod: Explanation and Example

[pirates01]

Homework Statement

How do I find Rotational inertia of this?http://yfrog.com/e4asdfasdfasdfj. Assumed thin rod (ignore r).

Homework Equations

I=1/12 M L²

The Attempt at a Solution

Cause that equation applies if the rotation axis is at the center, so I doubled d (and got like (2d)² and (4d)²) and used the equation, but I ended up with something like 5/3Md², but the answer at the back says its 8/3Md².

 

[Doc Al]

If you know the rotational inertia about the center of mass, use the parallel axis theorem to find the rotational inertia about the end.