Farid's grand parents have promised him RM12,000 when he completes his studies. Thinking that it will be after 4 years, they have just planned to put aside RM9,872.43 now for this purpose. (a) What is the interest rate per year that they will gain from the sum put aside? Knowing this, however, Farid has asked them to put aside RM10,116.23 now instead. (b) When will Farid complete his studies then