3. Simple Interest: Sarimah borrows RM15 000 for 5 years 6 months at 4.5% simple interest per annum. How much Sarimah has to pay at the end of 5 years 6 months? How much is the interest charged? Sheila had saved RM3000 in an account that offered r% simple interest per annum on 20 March 2015. If the interest on 6 June 2015 was RM50, find the value of r using Banker's Rule