In a certain code language, '6532' is written as '3467'. What will be the code for '7915' in that code language?

Study the following information to answer the given questions:
In a certain code ‘a friend of mine’ is written as ‘4 9 1 6’  ‘mine lots of metal’ is written as ‘3 1 0 9’ and ‘a piece of metal’ is written as ‘7 1 6 3’.

Which of the following may represent ‘a pleasure of mine’?

If CHILDREN is coded as LIHCNERD, then MOVEMENT will be coded as ____

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 certain code language, '743' means 'Mangoes are good', '657' means 'eat good food' and '934' means 'Mangoes are ripe'. Which digit means 'ripe' in that language code? 

If MUNREB is written as 628146 and IESRES as 345145, how will SERBER be written?

If FRIEND is written as HUMJTK in a code language, then how will CANDLE be written in that code?

If HEAD is coded as 37 and BANK is coded as 57, then how will KITE be coded as?