Please solve without using excel and with the appropriate formulas.

Ian deposits $800 into a fund today and $1,200 seventeen years later. Interest for the first 10 years is credited at a nominal discount rate of d compounded monthly. And interest for the next 10 years is credited at a continuous force of interest d, thereafter at a nominal interest rate of 3% compounded quarterly. The accumulated balance in the fund at the end of 30 years is $6,571. Calculate d.