A banks wants to invest $100,000 in three accounts : a stock fund which is estimated to bring in a 6% return, a bond fund which is estimated to bring in a 4% return and a savings account which is estimated to bring in a 1% return. For the stock fund, the bank must invest three times the amount in the savings fund. How much should the bank put in the three accounts in order to get a return of $4,450.