CREATE TABLE table_name_36 (clock_speed__mhz_ NUMBER, introduced VARCHAR2)

With April 1986 as the introduced, what is the least clock speed (MHz)?
SELECT MIN(clock_speed__mhz_) FROM table_name_36 WHERE introduced = "april 1986"
SELECT MIN("clock_speed__mhz_") FROM "table_name_36" WHERE "april 1986" = "introduced"