The City Council shall appoint a City Manager to act as the chief administrator of City government, and who is to be responsible to the City Council for the proper administration of the affairs of the City. The City Manager shall serve at the pleasure of the City Council and shall perform the duties and responsibilities set forth in Part 2, Article 7, Chapter 160A of the General Statutes, not inconsistent with this charter, and such other duties as may be assigned by the City Council.