CREATE TABLE table_26368963_2 (under_13 VARCHAR2, under_15 VARCHAR2)

What is every value for Under-13 when value for Under-15 is Maria Elena Ubina?
SELECT under_13 FROM table_26368963_2 WHERE under_15 = "Maria Elena Ubina"
SELECT "under_13" FROM "table_26368963_2" WHERE "Maria Elena Ubina" = "under_15"