Question 1 [25] a. Calculate the simple interest and sum accumulated for R5 000 borrowed for 90 days at 15% per annum. [9] b. A loan with a maturity value of R12 000 and an interest rate of 12% per annum is paid three months prior to its due date. Determine the present value on the day of the payment[9] c. Determine the number of days from 12 October to 15 May of the following year. [7]