Answer:
$134,235
Explanation:
The future value (FV) of each when you retire in 10 years:
FV of Bond = $200,000 *(1+7.5%)^10 = $412,206
FV of Stock = $400,000 *(1+11.5%)^10 = $1,187,979
After 10 years, the total amount you have is $1,600,185 (= $412,206 + $1,187,979)
The we use formula PMT in excel to calculate the amount you can withdraw in 25 years:
=PMT(6.75%,25,-1600185) = $134,235
Please see excel attached for the calculation.