Consider a scenario of Advertisement auction with quality score. There are five advisers (Ad1 - Ad5) who bid for listing at $24, $15, $10, $10 and $2 per click. The quality scores of their websites are 10, 40, 14, 4 and 12, respectively. Only three positions will be available. Which advisers' websites will be listed in which order? What is the actual cost per click (CPC) they need to pay (respectively)?