If in a certain code, ‘RESPONSES’ is written as ‘ESRONPESS’, then how can ‘SIGNATURE’ be written in the same code ?

In a certain code language, 'GAMBLE' is coded as '864321', and 'PLAY' is coded as '7265'. How will 'LAMB' be coded in that language? 

In a code language, RIVER is written a ERVRI how will TRAIN be written as in that language?

In a certain code language, “ARE” is coded as “87”, and “NOT” is coded as “4197”. How will “CAT” be coded in that language? 

In a certain code language, ‘JAN’ is written as ‘25’, ‘WED’ is written as ’32’. What is the code for ‘SEP’ in that code language?

If SHELF is FURYS, then ZEBRA is

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

If ‘DEAN’ is written as ‘NOKX’ then how ‘NEED’ is written in certain language?