3. On 15 August 2020, Aaira saved RM5,000 in an account that offers a simple interest rate of 7% per annum. She has issued a total savings on 14 February 2021. Calculate simple interest and the simple amount on the maturity date by using the following: i. Ordinary interest with Approximate time. ii. Exact interest Exact time. iii. Ordinary interest with Exact time (Banker's Rule). iv. Exact interest with approximate time. (5) (5) (5) (5) (Total: 20)​