Answer:
The withdrawals will be of $ 11,379.014 per month
Explanation:
Future value of the annuities:
C 750.00
time 360(30 years x 12 monhs per year)
rate 0.008333333 (10% / 12 months)
PV $1,695,365.9436
C 250.00
time 360 (30 years x 12 monhs per year)
rate 0.005 (6% / 12 months)
PV $251,128.7606
Total 1,695,365.84 + 251,128.76 = 1.946.494,6
and from here we withdraw for 25 years:
PV 1,946,495
time 300 (25 years x 12 months)
rate 0.004166667 (5% / 12 months)
C $ 11,379.014