Lillian makes the following deposits into her savings account. $1,500 in 2 years and $5,300 in 4 years. The interest rate is 2.4% p.a. compounded half-yearly for the first 3 years and becomes 3.6% p.a. compounded monthly thereafter. Calculate the amount in the savings account in 6 years. (Round your answer to the nearest cent.) (3 marks) write in formulas