In November, 2003, the Four Organizations Ranking 5 Through 8 $\begin{array} { l } y - z = z - u \\x - y = 3 ( y - u ) + 1 \\x - y + z - u = 15\end{array}$

In November, 2003, the four organizations ranking 5 through 8 in home Internet users in the US were eBay, the U.S. Government, Amazon, and Lycos, with a combined audience of 115 million users. Taking x to be the eBay audience in millions, y the U.S. Government audience in millions, z the Amazon audience in millions, and u the Lycos audience in millions, it was observed that
$\begin{array} { l } y - z = z - u \\x - y = 3 ( y - u ) + 1 \\x - y + z - u = 15\end{array}$
How large was the audience of each of the four companies in November, 2003
eBay
__________ millions
The U.S. Government
__________ millions
Amazon
__________ millions
Lycos
__________ millions