CREATE TABLE table_5235 ("Season" TEXT, "Tier" FLOAT, "Division" TEXT, "Pos." FLOAT, "Postseason" TEXT, "Cup Competitions" TEXT)

Which tier has a division of LEB 2 and Cup Competitions of Copa LEB Plata runner-up?
SELECT "Tier" FROM table_5235 WHERE "Division" = 'leb 2' AND "Cup Competitions" = 'copa leb plata runner-up'
SELECT "Tier" FROM "table_5235" WHERE "Cup Competitions" = 'copa leb plata runner-up' AND "Division" = 'leb 2'