Table: royal_canadian_mint_coins_4
Columns: year
animal
artist
finish
mintage
issue_price

Question: How many Red Breasted Nuthatch coins created before 2007 were minted, on average?
SQL: SELECT AVG("mintage") FROM royal_canadian_mint_coins_4 WHERE "animal" = 'red breasted nuthatch' AND "year" < 2007

Question: What year was the downy woodpecker coin created?
SQL: SELECT SUM("year") FROM royal_canadian_mint_coins_4 WHERE "animal" = 'downy woodpecker'

Question: Which artist created coins before 2010?
SQL: SELECT "artist" FROM royal_canadian_mint_coins_4 WHERE "year" < 2010