can anyone help with this code

 i need help on :
 we sum the balances of all of the Accounts ??
 print the total sum.
     print the owners of all the Accounts that have balances < 100 ?
Danny is generous  and wants to deposit 72 into all accounts with balances < 100
How many accounts have balances < 200 now ?
 First print the account information out ..
 How count how many
frank won Super Power Ball
replace her account with her new name  Madame Mona, with the balance of 4377
harry is leaving town  delete his account

public class Account {

private int balance;        //current balance 
private String owner;       // Account owner


public Account(String owner, int balance) {
    this.owner = owner;
    this.balance = balance;

}

public void deposit(int amt) {
    balance += amt;
}

public void withdraw( int amt) {
    balance -= amt;
}


public int getBalance () {
    return balance;
}


public String getOwner () {
    return owner;
}


public String toString () {
    return "Account :: Owner: " + owner + " Balance: " + balance ;
}


import java.util.ArrayList;

 public class ArrayCC {


//have to have globasl scope for the gBank
//declaree the array
static ArrayList<Account> gBank;


public static void main(String[] args) {

   gBank = new ArrayList<Account>(); //accessible as a paraneter 

    gBank.add(new Account("liz", 344));   \

    Account acct;   
    acct = new Account("tom", 76);   

    gBank.add(acct);      
    gBank.add(new Account("harry", 155));
    gBank.add(new Account("blake", 8));

    //how would you print all the objects? use advanced for loop
    for (Account i : gBank) {
        System.out.println(i);
    }



    gBank.add(2, new Account("Danny", 787));

        System.out.println("\nAt a club");
        for (Account i : gBank) {
        System.out.print(i);
    }

        gBank.set(2, new Account("Danny", 787));

        for (Account i : gBank) {
        System.out.println(i);
    }      


        gBank.get(getIndex("danny")).deposit(45);
        gBank.get(2).deposit(45);