According to annuity calculator at
http://www.calculator.net/annuity-payout-calculator.html?cstartingprinciple=2500000&cinterestrate=8&cinflationrate=0&cyearstopayout=30&camounttopayout=5000&cpayfrequency=annually&ctype=fixlength&x=55&y=4
payout would be 222,268.58 annually
divided amongst the three
3/6 = $ 111134.29 annually
2/6 = 74,089.53
1/6= 37,044.76