Which of the following describes the distribution of income in the US according to Economics Explained?

$20\%$ Poor; $40\%$ working class, $35\%$ middle class, and $5\%$ upper$-$class

$10\%$ Poor; $10\%$ working class, $75\%$ middle class, and $5\%$ upper$-$class

$40\%$ working class, $35\%$ middle class, and $25\%$ upper$-$class

$5\%$ Poor; $10\%$ working class, $15\%$ middle class, and $5\%$ upper$-$class