<Tr> <Th> </Th> <Th> Level 1 </Th> <Th> Level 2 </Th> <Th> Level 3 </Th> <Th> Level 4 </Th> <Th> Level 5 </Th> <Th> Level 6 </Th> <Th> Level 7 </Th> </Tr> <Tr> <Td> Points </Td> <Td> 1--249 </Td> <Td> 250--999 </Td> <Td> 1,000--2,499 </Td> <Td> 2,500--4,999 </Td> <Td> 5,000--9,999 </Td> <Td> 10,000--24,999 </Td> <Td> 25,000 + </Td> </Tr> <Tr> <Td> Questions </Td> <Td> 5 </Td> <Td> 10 </Td> <Td> 15 </Td> <Td> 20 </Td> <Td> 20 </Td> <Td> 20 </Td> <Td> 20 </Td> </Tr> <Tr> <Td> Answers </Td> <Td> 20 </Td> <Td> 80 </Td> <Td> 120 </Td> <Td> 160 </Td> <Td> 160 </Td> <Td> 160 </Td> <Td> 160 </Td> </Tr>

Which of these four factors of production measures the qualifications of a worker answers.com