<Table> <Tr> <Th_colspan="2"> Kansas </Th> </Tr> <Tr> <Td_colspan="2"> Kansas in 2016 </Td> </Tr> <Tr> <Th_colspan="2"> Background information </Th> </Tr> <Tr> <Th> Origin </Th> <Td> Topeka, Kansas, U.S. </Td> </Tr> <Tr> <Th> Genres </Th> <Td> <Ul> <Li> Progressive rock </Li> <Li> art rock </Li> <Li> hard rock </Li> </Ul> </Td> </Tr> <Tr> <Th> Years active </Th> <Td> <Ul> <Li> 1973--1984 </Li> <Li> 1985--present </Li> </Ul> </Td> </Tr> <Tr> <Th> Labels </Th> <Td> <Ul> <Li> Kirshner </Li> <Li> MCA </Li> <Li> Magna Carta </Li> <Li> Inside Out </Li> </Ul> </Td> </Tr> <Tr> <Th> Associated acts </Th> <Td> <Ul> <Li> Proto - Kaw </Li> <Li> Streets </Li> <Li> AD </Li> <Li> Seventh Key </Li> <Li> Native Window </Li> <Li> Dixie Dregs </Li> <Li> Deep Purple </Li> <Li> Shooting Star </Li> </Ul> </Td> </Tr> <Tr> <Th> Website </Th> <Td> kansasband.com </Td> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> <Tr> <Th> Members </Th> <Td> <Ul> <Li> Phil Ehart </Li> <Li> Rich Williams </Li> <Li> Billy Greer </Li> <Li> David Ragsdale </Li> <Li> David Manion </Li> <Li> Ronnie Platt </Li> <Li> Zak Rizvi </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> <Tr> <Th> Past members </Th> <Td> <Ul> <Li> Kerry Livgren </Li> <Li> Dave Hope </Li> <Li> Robby Steinhardt </Li> <Li> Steve Walsh </Li> <Li> John Elefante </Li> <Li> Steve Morse </Li> <Li> Greg Robert </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Kansas </Th> </Tr>

Who are the current members of the band kansas