Who were the writers of the episode titled 'Tricky Dick'?
CREATE TABLE table_74390 (
    "No. in series" real,
    "No. in season" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production code" real
)
SELECT "Written by" FROM table_74390 WHERE "Title" = 'Tricky Dick'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Who were the writers of the episode titled 'Tricky Dick'? ### Input: CREATE TABLE table_74390 (
    "No. in series" real,
    "No. in season" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production code" real
) ### Response: SELECT "Written by" FROM table_74390 WHERE "Title" = 'Tricky Dick'