Which are correct:<br/><br/><span style="color:#ff0000;">1-John, I understand. Phil, less.</span><br/><span style="color:#800080;">2-John, I understand. Phil, less so.</span><br/>(I understand Phil less than John.)<br/><br/><span style="color:#ff0000;">3-John works hard. Phil, less.</span><br/><span style="color:#800080;">4-John works hard. Phil, less so.</span><br/>(Phil does not work as hard)<br/><br/><span style="color:#ff0000;">5-John works a lot. Phil, less.</span><br/><span style="color:#800080;">6-John works a lot. Phil, less so.</span><br/>(Phil does not work as much.)