SELECT "Apparatus" FROM table_79563 WHERE "Score-Final" < '75.5' AND "Score-Qualifying" < '18.7'
On which apparatus did Kanayeva have a final score smaller than 75.5 and a qualifying score smaller than 18.7?
CREATE TABLE table_79563 (
    "Year" real,
    "Competition Description" text,
    "Location" text,
    "Apparatus" text,
    "Rank-Final" text,
    "Score-Final" real,
    "Rank-Qualifying" text,
    "Score-Qualifying" real
)