<Tr> <Th> </Th> <Th> Computer A </Th> <Th> Computer B </Th> <Th> Computer C </Th> </Tr> <Tr> <Td> Program 1 </Td> <Td> 0.05 </Td> <Td> 0.5 </Td> <Td> </Td> </Tr> <Tr> <Td> Program 2 </Td> <Td> 50 </Td> <Td> 5 </Td> <Td> </Td> </Tr> <Tr> <Td> Arithmetic mean </Td> <Td> 25.025 </Td> <Td> 2.75 </Td> <Td> </Td> </Tr>

What is geometric mean of 4 and 9