The Council shall be composed of a Mayor and four Council Members, all of whom must be eligible to hold office under the Constitution of this State. Two Council Members shall be elected from each Ward and the Mayor shall be elected at-large. Each Council Member shall serve for a term of four years and until his or her successor is elected and qualifies. The Mayor shall serve for a term of four years and until his or her successor is elected and qualifies. The Council shall be judges of the election returns.