CREATE TABLE table_71162 ("Year" FLOAT, "Men's singles" TEXT, "Women's singles" TEXT, "Women's doubles" TEXT, "Mixed doubles" TEXT)

Who participated in the Mixed Doubles when Tracey Hallam participated in the Women's Singles?
SELECT "Mixed doubles" FROM table_71162 WHERE "Women's singles" = 'tracey hallam'
SELECT "Mixed doubles" FROM "table_71162" WHERE "Women's singles" = 'tracey hallam'