Simplifying a Boolean expression with a Karnaugh map

[mr_coffee]

here is my work and picture:
http://img146.imageshack.us/img146/1349/asdfas7hu.jpg"
is this the simplest form? Thanks.

if that link is slow, also u can try this one:
http://show.imagehosting.us/show/771087/0/nouser_771/T0_-1_771087.jpg

 

[mr_coffee]

crap i was in the wrong forum when i posted this, can the moderater transfer this into the electrical engineering forum? thanks!