Looks good to me.
I have the equation:
w'xyz+ w'xyz' + wx'yz' + wx'y'z' + wxy'z + wx'y'z + w'xy'z + w'x'y'z
and the karnaugh map
........wx........wx'........w'x'........w'x
yz......0..........0...........0...........1
yz'......0..........1...........0...........1
y'z'.....0..........1..........0.............0
y'z......1..........1.........1.............1
so i have 2 pairs of 2 (in italics)
and i group of 4(in bold)
and my minimal representation is
w'xy + wx'z' + y'z
have i worked through this correctly?
thanks for any help.