$200 is placed in an account at time t=3.2 and earns simple interest at a rate of 6%.$300 is placed in an account at time t=2.5 and earns compound interest at a rate of i=4.2%. a) [3 points] What is the total value of the two investments at time t=8.6 ? (round to 2 decimal places) b) [1 point] What amount of money would have to be invested at time 0 in an account that earns compound interest at i=5.1% to have the same accumulated value at t=8.6 as the two investments in part (a)? (round to 2 decimal places)