The mayor shall be the chief conservator of the peace within the city; shall supervise the administration of the affairs of the city; shall see that all ordinances of the city are enforced; shall recommend to council for adoption any measures the mayor may deem necessary or expedient; shall with the director of finance keep council advised of the financial condition and future needs of the city; shall prepare and submit any reports required by council; and shall exercise powers and perform duties conferred upon or required of the mayor by this charter, by ordinance or resolution of council, or by general law.