If in a certain language,$POPULAR$ is coded as $QPQVMBS$,which word would be coded as $GBNPVT$?

If $REASON$ is coded as $5$ and $BELIEVED$ as $7$,what is the code number for $GOVERNMENT$?

If $TAP$ is coded as $SZO$,then how is $FREEZE$ coded?

If $PEOPLE$ is coded as $PLPOEE$,how is $TREND$ coded?

In a certain code,'go home' is written as 'ta na' and 'nice little home' is written as 'na ja pa'. How is 'go' written in that code?

The word $EXPAND$ has been written in four different codes by applying four different rules. $A$ word $TRAVELLER$ has been written in one of these codes. Identify the correct code for $TRAVELLER$ from the given options.
$EXPAND$ $(a)$ $FYQBOE$ $(b)$ $EPDTCR$ $(c)$ $GYRBPE$ $(d)$ $CWNZLC$
$TRAVELLER$ : ?