(8 marks) Dae-Sung invests $X for 12 years at a constant force of interest delta. a) Write down the definition of force of interest. b) Write an equation for the balance in Dae-Sung's account after 12 years. C) Ife invests the same amount of money in an account that pays constant force of interest 1.6 * delta. How long until the amount of money in Ife's account matches the amount of money Dae-Sung will have in his account after 12 years