<Tr> <Td> 7 </Td> <Td> ruim voldoende </Td> <Td> more than sufficient </Td> <Td> </Td> <Td> B+ </Td> </Tr> <Tr> <Td> 6.5 </Td> <Td> voldoende </Td> <Td> sufficient </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 6 </Td> <Td> voldoende </Td> <Td> sufficient </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 5.5 </Td> <Td> matig </Td> <Td> mediocre </Td> <Td> </Td> <Td> </Td> </Tr>

What letter grade is 24 out of 40