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

The word $EXPAND$ is encoded using four different rules,resulting in four different codes. Identify the rule applied to the word $TRAVELLER$ to obtain the code $USBWFMMFS$.

$(A)$ '$134$' means 'you are well',
$(B)$ '$758$' means 'they go home',
$(C)$ '$839$' means 'we are home'.
Which of the statements can be dispensed with while answering the above question?

If in a certain language,$UTENSIL$ is coded as $WVGPUKN$,which word would be coded as $DMSFXG$?

In a certain code $GROUP$ is written as $OTNQF$. How is $THEIR$ written in that code?

In a certain code language $24685$ is written as $33776$. How is $35791$ written in that code?