Waldon Toys owes $3000 due in 2 years with interest at 11% compounded semi-annually and $2500 due

Question:

Waldon Toys owes $3000 due in 2 years with interest at 11% compounded semi-annually and $2500 due in 15 months at 9% compounded, quarterly. If the company wants to discharge these debts by making two equal payments, the first now and the second 18 months from now, what is the size of the two payments if money is now worth 8.4% compounded monthly?