Scheme 1: 65438+ 0 first prize, 2 second prizes and 7 third prizes;

Scheme 2: 65438+ 0 first prize, 3 second prizes and 6 third prizes;

Scheme 3: 65438+ 0 first prize, 4 second prizes and 5 third prizes;

Scheme 4: 2 first prizes, 3 second prizes and 5 third prizes;

The above four schemes all meet the meaning of the problem.