Table:
text: Echo-class submarine
Ships
Echo II class — significant dates
_ Shipyard Laid_down Launched Commissioned Fleet Status_
K-125 SEVMASH, Severodvinsk September 1, 1964 September 11, 1965 December 18, 1965 Northern Decommissioned 1991 for scrapping
K-48 Leninskiy Komsomol Shipyard, Komsomolsk-na-Amure April 11, 1964 June 16, 1965 December 31, 1965 Pacific Decommissioned 1990 for scrapping
K-128 K-62 SEVMASH, Severodvinsk October 29, 1964 December 30, 1965 August 25, 1966 Northern Decommissioned 1990 for scrapping
K-56 Leninskiy Komsomol Shipyard, Komsomolsk-na-Amure May 30, 1964 August 10, 1965 August 26, 1966 Pacific Decommissioned 1992 for scrapping
K-131 B-131 SEVMASH, Severodvinsk December 31, 1964 June 6, 1966 September 30, 1966 Northern Decommissioned 1994 for scrapping
K-10 Leninskiy Komsomol Shipyard, Komsomolsk-na-Amure October 24, 1964 September 29, 1965 October 15, 1966 Pacific Decommissioned 1989 for scrapping

Question: When were the ships launched on September 1, 1964 for Echo class submarines?

Question: Name the number of ii - important dates, ships commissioned on 18 December 1965 for Echo class submarines?