Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Educating Essex
Table title:
Episodes
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > No. overall </th><th colspan=1 rowspan=1 > Episode </th><th colspan=1 rowspan=1 > Original air date </th><th colspan=1 rowspan=1 > UK viewers (millions) </th></tr>
<tr> <th colspan=1 rowspan=1 > 1 </th><td colspan=1 rowspan=1 > Episode 1 </td><td colspan=1 rowspan=1 > 22 September 2011 </td><td colspan=1 rowspan=1 > 1.92 </td></tr>
<tr> <td colspan=4 rowspan=1 > History teacher and deputy head Mr Drew must enforce the school's rules by confiscating banned items of clothing and holding detentions. </td></tr>
<tr> <th colspan=1 rowspan=1 > 2 </th><td class="highlighted"  colspan=1 rowspan=1 > Episode 2 </td><td colspan=1 rowspan=1 > 29 September 2011 </td><td class="highlighted"  colspan=1 rowspan=1 > 1.79 </td></tr>
<tr> <td colspan=4 rowspan=1 > Head girl Gabby is being bullied by a group of her former friends. One night, she receives a series of menacing text messages from an unknown number. </td></tr>
<tr> <th colspan=1 rowspan=1 > 3 </th><td colspan=1 rowspan=1 > Episode 3 </td><td colspan=1 rowspan=1 > 6 October 2011 </td><td colspan=1 rowspan=1 > 2.01 </td></tr>
<tr> <td colspan=4 rowspan=1 > Vinni, who was previously academically successful and well behaved before his parents split up, is getting worse: he wanders around corridors to avoid lessons, and converses with his favourite teacher Miss Conway and head teacher Mr Goddard on how he has changed and is on the wrong path. </td></tr>
<tr> <th colspan=1 rowspan=1 > 4 </th><td class="highlighted"  colspan=1 rowspan=1 > Episode 4 </td><td colspan=1 rowspan=1 > 13 October 2011 </td><td class="highlighted"  colspan=1 rowspan=1 > 2.11 </td></tr>
<tr> <td colspan=4 rowspan=1 > Rumour spreads around Passmores that Sky is pregnant: her boyfriend Liam is asked about this, and reveals that he is aware of the news and regrets having had unprotected sex. </td></tr>
<tr> <th colspan=1 rowspan=1 > 5 </th><td colspan=1 rowspan=1 > Episode 5 </td><td colspan=1 rowspan=1 > 20 October 2011 </td><td colspan=1 rowspan=1 > 2.05 </td></tr>
<tr> <td colspan=4 rowspan=1 > Carrie and Ashleigh are two popular girls whose friendship holds together their social group: when they turn against each other, everyone is affected. </td></tr>
<tr> <th colspan=1 rowspan=1 > 6 </th><td colspan=1 rowspan=1 > Episode 6 </td><td colspan=1 rowspan=1 > 27 October 2011 </td><td colspan=1 rowspan=1 > 1.97 </td></tr>
<tr> <td colspan=4 rowspan=1 > The bright Mollie is put on report to Mr Drew. Her elder sister Charlotte is sent out of a lesson, and the two argue in his office. </td></tr>
<tr> <th colspan=1 rowspan=1 > 7 </th><td colspan=1 rowspan=1 > Episode 7 </td><td colspan=1 rowspan=1 > 3 November 2011 </td><td colspan=1 rowspan=1 > 2.06 </td></tr>
<tr> <td colspan=4 rowspan=1 > Thoughts turn to leaving school as new arrival Ryan, who has Asperger's, and Vinni, who is now living in a children's home, challenge the school. </td></tr>
</table>
Question:
Which episodes of Educating Essex had the highest and lowest viewership, and what was the viewership totals for those two episodes?
Answer:
Educating Essex included a peak of 2.11 million for episode 4 and episode 2 being the lowest with 1.79 million viewers.