ebook correction: Larger 4-variable Karnaugh maps

Hi,
I have a minor correction for the ebook. A pair of labels are reversed on a graphic.
This page:
http://www.allaboutcircuits.com/vol_4/chpt_8/7.html
About half way down where it says:
"The Boolean expression below has nine p-terms"

The graphic below that has B' and D' reversed. i.e. The red dashed line is actually B', while the solid blue line is actually D'.
See attached screen shot for details.

Hope that helps.
- Randy

I acknowledge the mistake. Red is B' and blue is D'.

Thank you for your remark.

Here is a possible correction. Think it would work?

Before:




After:




Thread has been added to corrections thread.

Gathering place for threads pointing out errors in AAC book

Looks good to me. Good job.