present value or future value CONFUSED

Two payments of $850 and $600 must be made two years and five years from now respectively. If money can earn 4% compounded semi-annually,what single payment,three years from now, would be equivalent to the two scheduled payments? Use the date of the single payment as the frocal date

for that question i bought the $850 payment which must be paid two years from now to the present and the $600 payment which should be paid 5 years from now to the presnt

i'm confused