In C, there is an integer array defined below:

int a[2][4] = {{1,2,3,4},{5,6,7,8}}

printIntArray(a);

And following function pass array in different ways:

1) void printIntArray ( int a[2][4] )

2) void printIntArray ( int a[8][4] )

3) void printIntArray ( int (*a)[4] )

4) void printIntArray ( int a[4][8] )

5) void printIntArray ( int **a )

The first three is compatible, and forth and fifth are not. Can you explain why? Thanks.