B3. (15 marks) public class City { // modelling City protected string cN; // name of city private int cP; // population of city static final int P_BIGCITY 3;//bigcity population: 3 million City (String cn, int cP) { // TO BE COMPLETED } public void setCP (int p) { CP = p; } int getCP() { return cP; } } Only consider the programme code given above and the comment information, answer the following questions a) Draw the UML class diagram, only related to the given program code above. [8 marks/ b) To complete the given constructor, write only two statements for the body of this given constructor, which: o assigns the field of city name with the value of the right input parameter using assignment operator, and then sets the field of population with the value of the right input parameter using proper method, without using assignment operator. [3 marks) c) Write an overloading constructor, which accepts only one argument for setting the name field. The body of this constructor properly calls its another constructor with the input parameter as the name and the class constant as the population of the city. This constructor is for the usage within the same package and all its subclasses