Table:
text: 1979 World Wrestling Championships
Medal table
Medal table
Rank_ Nation Gold Silver Bronze Total
1 Soviet Union 9 5 2 16
2 Hungary 4 1 0 5
3 Bulgaria 2 2 3 7
4 Japan 2 2 1 5
5 United States 1 5 4 10
6 Romania 1 0 2 3
7 Poland 1 0 1 2
7 Sweden 1 0 1 2
9 East Germany 0 2 2 4
10 West Germany 0 1 3 4
11 Yugoslavia 0 1 0 1
12 Italy 0 0 1 1
Total Total 21 19 20 60

Question: What is the total of gold medals for the nation with 5 total and less than 0 bronze medals at the 1979 World Wrestling Championships?

Question: What is the sum of gold medals for the entire nation that has more than 19 silver medals at the 1979 World Wrestling Championships?

Question: Looking at the 1979 World Wrestling Championships, what is the nation's average number of silver medals with 3 bronzes and 4+ overall?