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:
Copper–tungsten
Table title:

Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Composition </th><th colspan=1 rowspan=1 > Density </th><th colspan=1 rowspan=1 > Hardness </th><th colspan=1 rowspan=1 > Resistivity </th><th colspan=1 rowspan=1 > IACS </th><th colspan=1 rowspan=1 > Bending strength </th></tr>
<tr> <td colspan=1 rowspan=1 > wt. % </td><td colspan=1 rowspan=1 > g/cm3≥ </td><td colspan=1 rowspan=1 > HB Kgf/mm2≥ </td><td colspan=1 rowspan=1 > µΩ.cm≤ </td><td colspan=1 rowspan=1 > %≥ </td><td colspan=1 rowspan=1 > Mpa≥ </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > W50/Cu50 </td><td class="highlighted"  colspan=1 rowspan=1 > 11.85 </td><td colspan=1 rowspan=1 > 115 </td><td colspan=1 rowspan=1 > 3.2 </td><td colspan=1 rowspan=1 > 54 </td><td colspan=1 rowspan=1 > – </td></tr>
<tr> <td colspan=1 rowspan=1 > W55/Cu45 </td><td colspan=1 rowspan=1 > 12.30 </td><td colspan=1 rowspan=1 > 125 </td><td colspan=1 rowspan=1 > 3.5 </td><td colspan=1 rowspan=1 > 49 </td><td colspan=1 rowspan=1 > – </td></tr>
<tr> <td colspan=1 rowspan=1 > W60/Cu40 </td><td colspan=1 rowspan=1 > 12.75 </td><td colspan=1 rowspan=1 > 140 </td><td colspan=1 rowspan=1 > 3.7 </td><td colspan=1 rowspan=1 > 47 </td><td colspan=1 rowspan=1 > – </td></tr>
<tr> <td colspan=1 rowspan=1 > W65/Cu35 </td><td colspan=1 rowspan=1 > 13.30 </td><td colspan=1 rowspan=1 > 155 </td><td colspan=1 rowspan=1 > 3.9 </td><td colspan=1 rowspan=1 > 44 </td><td colspan=1 rowspan=1 > – </td></tr>
<tr> <td colspan=1 rowspan=1 > W70/Cu30 </td><td colspan=1 rowspan=1 > 13.80 </td><td colspan=1 rowspan=1 > 175 </td><td colspan=1 rowspan=1 > 4.1 </td><td colspan=1 rowspan=1 > 42 </td><td colspan=1 rowspan=1 > 790 </td></tr>
<tr> <td colspan=1 rowspan=1 > W75/Cu25 </td><td colspan=1 rowspan=1 > 14.50 </td><td colspan=1 rowspan=1 > 195 </td><td colspan=1 rowspan=1 > 4.5 </td><td colspan=1 rowspan=1 > 38 </td><td colspan=1 rowspan=1 > 885 </td></tr>
<tr> <td colspan=1 rowspan=1 > W80/Cu20 </td><td colspan=1 rowspan=1 > 15.15 </td><td colspan=1 rowspan=1 > 220 </td><td colspan=1 rowspan=1 > 5.0 </td><td colspan=1 rowspan=1 > 34 </td><td colspan=1 rowspan=1 > 980 </td></tr>
<tr> <td colspan=1 rowspan=1 > W85/Cu15 </td><td colspan=1 rowspan=1 > 15.90 </td><td colspan=1 rowspan=1 > 240 </td><td colspan=1 rowspan=1 > 5.7 </td><td colspan=1 rowspan=1 > 30 </td><td colspan=1 rowspan=1 > 1080 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > W90/Cu10 </td><td class="highlighted"  colspan=1 rowspan=1 > 16.75 </td><td colspan=1 rowspan=1 > 260 </td><td colspan=1 rowspan=1 > 6.5 </td><td colspan=1 rowspan=1 > 27 </td><td colspan=1 rowspan=1 > 1160 </td></tr>
</table>
Question:
What is the highest and lowest density of any copper-tungsten mixture?
Answer:
The highest density is that of CuW90 with 16.75 g/cm³ and the lowest is 11.85 g/cm³ for CuW50.