The table shows the age groups of the contestants in a singing contest and the languages of songs selected by them. Language Cantonese Mandarin English Age 18 - 22 N 23 - 27 T 28 - 32 (a) How many ways are there to select 3 contestants from different age groups? (b) How many ways are there to select 3 contestants from the same age group but singing songs in different languages? (c) How many ways are there to select 2 contestants singing songs in different languages? Example 54