Answer
(a)Entrepreneurial ability= 10 Billion Dollars.
(b)Revenue = 100 Billion Dollars.
Work Step by Step
(a)Entrepreneurial ability= 100 -60 - 10 - 20
= 10 Billion Dollars.
(b)Revenue = Total Spending by Households
= 55 + 45
= 100 Billion Dollars.