On 01/01/1997, Kelly deposits X into a bank account. The account is credited with simple interest at the rate of 10% per year On the same date, Tara deposits X into a different bank account. The account is credited interest using a force of interest, for t being time in years since the investment is made where 2t From the end of the 4th year until the end of the 8th year, both accounts earn the same dollar amount of interest. Calculate k. Give your answer rounded to the nearest whole number