Detecting XOR in Karnaugh Maps
<p>I got the following Karnaugh Maps but I am still having problems working out the expression for XOR from each table. </p>

<pre><code>                Table 1
                -------
                  WZ
         00    01   11   10
       -----------------------
    00 |     |    |    |  1  |
       -----------------------
    01 |  1  |    |    |     |
       -----------------------
XY  11 |     |    |    |  1  |
       -----------------------
    10 |  1  |    |    |     |
       -----------------------


                Table 2 
                -------
                   WZ
         00     01   11   10
       -----------------------
    00 |     |  1  |     |   |
       -----------------------
    01 |     |     |  1  |   |
       -----------------------
XY  11 |     |  1  |     |   |
       -----------------------
    10 |     |     |  1  |   |
       -----------------------
</code></pre>

<p>It is XORs, but how can I easily deduce the XOR expressions?</p>