Suppose George made $20,000 last year and he lives I n the country of Harmony. The way Harmony levies income taxes, each citizen must pay 10% in taxes on their first $10,000 in earnings and then 50% in taxes on anything else they may earn. So given that George earned $20 last year, his marginal tax rate on the last dollar he earns will be ______ and his average tax rate for his entire income will be ______.