Exercise 2 Leila won a bursary of R25 000. Instead of using it straight away, she deposited it for one year in a fixed deposit account earning 10% p.a., compounded quarterly. At the end of the year, she won another bursary worth R30 000. She added this amount to the accumulated amount in the bank. At the same time, the interest rate increased to 12% p.a., compounded monthly. At the end of the 5th year, she withdrew R20 000, and the interest rate dropped to 11,5% p.a., compounded half-yearly. What is the balance in the account after six years? ​