Number of possible Functions

'A' = {1, 2, 3, 4, ............, n},
'B' = {1, 2, 3, 4, ............, m} 

1. If set ‘A’ contain ‘3’ element and set ‘B’ contain ‘2’ elements then total number of function possible will be .
2. If set ‘A’ contain ‘5’ element and set ‘B’ contain ‘2’ elements then total number of function possible will be .

1. If set ‘A’ contain ‘3’ element and set ‘B’ contain ‘2’ elements then the total number of functions possible will be .
2. If set ‘A’ contain ‘5’ element and set ‘B’ contain ‘2’ elements then the total number of function possible will be .

'A' = {1, 2, 3, 4, ............, n},   
'B' = {1, 2, 3, 4, ............, m} 
'C' = {1, 2, 3, 4, ............, p}