Given the definition of Laptop class as follows: public class Laptop { private String brand; //HP, Acer, ASUS private double price; //price per unit private int RAM; //memory space in GigaByte (GB), e.g: 2,4 private int USBport; //number of USB port, e.g: 2, 3, 4 //normal constructor: public Laptop (String, double, int, int) //printer method: toString0 //processor method: upgradeRAM (int) //accessors: getBrand (), get Price (), getRAMO, getUSB () Write the definition of the following methods: a) A normal constructor that initializes all data members with the given values through its parameter (brand= Acer, price = RM3,999, RAM = 4Gb, USB Port = 2). b) (3 marks) Write the accessor method get Brand () to get the laptop brand and accessor method getUSB () to get number of USB port. (3 marks)