Answer :
first quarter = 4 million / (1/3+1) = 3 million
second quarter = 4 million
third quarter = 4 million / (4/5) = 5 million
3+4+5 = 12 million
second quarter = 4 million
third quarter = 4 million / (4/5) = 5 million
3+4+5 = 12 million