1. ## karnaugh map

I used a karnaugh map to find the minimal representation of this:
x'y'z + x'y'z' + x'yz'

........xy......xy'.....x'y'....x'y.....
z.......0........0........1......0.....
z'.......0........0........1.....1.....

so my minimal representation is
x'y' + x'z'

is this ok?

2. Looks good to me.