A political campaign wants to estimate the number of adult residents who voted in the last city election. Answer the following. (a)Which of the following surveys probably would best represent the entire adult population of the city?     20  senior residents are randomly selected;  16  voted in the last election.   20  adult residents are randomly selected from the city;  11  voted in the last election.   20  business owners are randomly selected;  17  voted in the last election. (b)There are  17,100  adults who live in the city. Using your answer from part (a), estimate the number of adults who voted in the last city election. adults