If the word 'HELLO' is coded as '851212', what is the code for 'WORLD'?

C. 231215

What is the code for 'RAT' if A=1, B=2, C=3, ..., Z=26?

A. 181920

If 'APPLE' is coded as '11616125', what is the code for 'GRAPE'?

A. 71816125