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; /umber of usB port, e.g: 2,3,4 /ormal constructor: public Laptop (String, double, int, int) // printer method: toStringo //processor method: upgradeRAM(int) //accessors: getBrand (), getPrice (), 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). (3 marks) b) Write the accessor method getBrand () to get the laptop brand and accessor method getUSB () to get number of USB port