What is the processor speed (mhz) for part number a80486dx4-75?
CREATE TABLE table_15261_1 (
    processor_speed__mhz_ VARCHAR,
    part_number VARCHAR
)
SELECT COUNT(processor_speed__mhz_) FROM table_15261_1 WHERE part_number = "A80486DX4-75"
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: What is the processor speed (mhz) for part number a80486dx4-75? ### Input: CREATE TABLE table_15261_1 (
    processor_speed__mhz_ VARCHAR,
    part_number VARCHAR
) ### Response: SELECT COUNT(processor_speed__mhz_) FROM table_15261_1 WHERE part_number = "A80486DX4-75"