CREATE TABLE table_name_76 (year_introduced_mrwa VARCHAR, wheel_arrangement VARCHAR)

What was the year the MRWA with a wheel arrangement of 4-6-2 was introduced?
SELECT year_introduced_mrwa FROM table_name_76 WHERE wheel_arrangement = "4-6-2"
SELECT "year_introduced_mrwa" FROM "table_name_76" WHERE "4-6-2" = "wheel_arrangement"