CREATE TABLE table_41587 ("Position" TEXT, "Jersey number" FLOAT, "Name v t e" TEXT, "Height  ( cm ) " FLOAT, "Weight  ( kg ) " FLOAT, "Birthplace" TEXT, "2008-09 team" TEXT, "NHL rights ,  if any" TEXT)

What is the average weight of the player with a height of 180 cm and plays the d position?
SELECT AVG("Weight (kg)") FROM table_41587 WHERE "Height (cm)" = '180' AND "Position" = 'd'
SELECT AVG("Weight (kg)") FROM "table_41587" WHERE "Height (cm)" = '180' AND "Position" = 'd'