PATH details

I am using Solaris 10

Please tell me which path values are necessary for

PATH=
MANPATH=
LD_LIBRARY_PATH=

SunOS 5.10 Generic_118844-26 i86pc i386 i86pc

Login with ssh I get

PATH=/usr/bin
MANPATH=
LD_LIBRARY_PATH=

With dtlogin I get

PATH=/usr/bin:/usr/dt/bin:/usr/openwin/bin:/usr/ucb
MANPATH=/usr/dt/man:/usr/man:/usr/openwin/share/man
LD_LIBRARY_PATH=/usr/local/lib