3. Design and implement the CityInfo class that matches with the following specification. The CityInfo is represented using city name, population and average annual household income. It should have a constructor that takes all of the above three data members at the time of object creation. In addition to the constructor, the CityInfo class has following methods

setAnnualIncome : take number of new annual household income as a parameter and update average annual household income getPopulation : returns the name of the population toString : this method should return the name, population and annual household income

a) Draw the UML diagram that design the CityInfo class above

b) Implement CityInfo.java program