CREATE TABLE table_72628 ("Year" FLOAT, "Mens singles" TEXT, "Womens singles" TEXT, "Mens doubles" TEXT, "Womens doubles" TEXT, "Mixed doubles" TEXT)

In 2001, where the mens singles is armand jehle and the womens singles is michaela ritter, who are the mixed doubles
SELECT "Mixed doubles" FROM table_72628 WHERE "Womens singles" = 'Michaela Ritter' AND "Mens singles" = 'Armand Jehle'
SELECT "Mixed doubles" FROM "table_72628" WHERE "Mens singles" = 'Armand Jehle' AND "Womens singles" = 'Michaela Ritter'