Marcia has an option to invest in an insurance policy at a rate of 20% to achieve her goal of purchasing the car for $2,500,000. How much should she invest at the beginning of each year for the next 5 years in order to achieve her goal? (5 marks) If the interest rate decreases from 20% to 15%, by how much would Marcia's annual investment in part C. change? (6 marks) (Total 20 marks)