3. Metropolitan area A has 4 school districts. The share of students attending each district is 0.55, 0.3, 0.05, 0.1. Metropolitan area B has 10 school districts. The share of students attending the 5 largest districts is 0.12 and the share of students attending the smallest 5 districts is 0.08. (a) Compute the Herndahl index for each city (b) In which city would you expect to nd more inter-school district competition? Which city do you think has greater school choice