6. (*) A bank account is giving 4% interest per annum compounded monthly to savers, and a cus- tomer wishes to deposit into the bank account a fixed amount each month in order to accumulate a total sum of $10,000 at the end of five years. Determine how much should be deposited each month. hint: 1+a + a + a2 + ... +459 1-260 1-a for a + 1