Hi there
the agreement didn't state how income and losses would be divided
So the dividend will be distributed according to the share of capital
for example Assume that Mary's share of capital is 1000 and Jeff's share of capital is 2000 and income is 1500
So we want to distribute the income 1500 between them according to their investments
Mary share of income is
1,500×(1,000÷(1,000+2,000))=500
Jeff share of income is
1,500×(2,000÷(1,000+2,000))=1,000
So it's b
Good luck!