In order to be included on the ballot in a certain city, a candidate must get at least 12.5% of the registered voters in each of three or more of the city’s five districts to sign a petition. the ratio of the numbers of registered voters in the five districts is 6: 5: 5: 4: 5. in order for a candidate to be included on a ballot, what is the minimum percent of the total number of registered voters that must sign a petition? (a) 2%(b) 5%(c) 7%(d) 10%