John finances his daughter's college education by making deposits into a fund earning interest at an annual effective rate of 8%. For 18 years, he deposits x at the beginning of each month. In the 17th through 20th years, he makes a withdrawal of $25,000 at the beginning of each year. The final withdrawal reduces the fund balance to zero. Calculate X :a.) 206.09 b.) 190.82 c.) 318.98 d.) 966.73