The following diagram shows select information for an economy made up of three industries for a particularly yea r. i = interest; w = wages-\"salaries; r = rent; p = prot; m = intermediate inputs; 5 = market value of total industry output; f = market value of industry output sold as 'final' products. Note: All values are in billions of dollars. What is the value-added by Industry 3? 0 none is correct $40 billion $50 billion $90 billion $100 billion