3. Convert the following code so that it uses while loops instead of for loops. public class Loop public static void main(String[] args) { int Q, A=356, R, C=323, X=579, D, B--67; for(Q=324;A10;R+-2) { C+B; R++; } D C*B; } } } 4. Write a program that uses a for loop to calculate the sum of the reciprocals of the N amount of numbers. The user will be prompted to enter a number for n. Validate that the number is positive and do not do the calculation until a positive number is received. If the user enters '3" the loop will calculate: 1/1 +1/+% If the user enters '6', the loop will calculate: 1/1 + 2+ 3+ 4+1+% i.e. 1/1 +/+1+14+15+1 .......+1