<Table> <Tr> <Th_colspan="2"> "Chair Model" </Th> </Tr> <Tr> <Td_colspan="2"> The Office episode </Td> </Tr> <Tr> <Th> Episode no . </Th> <Td> Season 4 Episode 14 </Td> </Tr> <Tr> <Th> Directed by </Th> <Td> Jeffrey Blitz </Td> </Tr> <Tr> <Th> Written by </Th> <Td> B.J. Novak </Td> </Tr> <Tr> <Th> Production code </Th> <Td> 414 </Td> </Tr> <Tr> <Th> Original air date </Th> <Td> April 17, 2008 </Td> </Tr> <Tr> <Th> Running time </Th> <Td> 22 minutes </Td> </Tr> <Tr> <Th_colspan="2"> Guest appearance (s) </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> Brooke Dillman as Margaret </Li> <Li> Bobby Ray Shafer as Bob Vance </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Episode chronology </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> ← Previous "Dinner Party" </Td> <Td> Next → "Night Out" </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> The Office (U.S. season 4) List of The Office (U.S. TV series) episodes </Td> </Tr> </Table> <Tr> <Th_colspan="2"> "Chair Model" </Th> </Tr> <Tr> <Td_colspan="2"> The Office episode </Td> </Tr> <Tr> <Th> Episode no . </Th> <Td> Season 4 Episode 14 </Td> </Tr>

Who played the chair model in the office