Complete the following Java program to perform the tasks indicated in the in-line comments below. import java.util. Scanner; public class T1 Q12 public static void main (Stringl) args) int quantity double unitPrice, totalCost Scanner scan new Scanner (System.in); / /Write Java codes that prompt the user to enter quantity and read it into the proper variable / /Write javatodes that prompt the user to enter unit price and read it into the proper variable / /Compute the total cost // printout all variables with proper labels and lineup the outputs using tabs 7 8