Suppose this year the working population is 11 million and growing at 15% per year. The current capital stock is 300 million and depreciating at 8% per year. The necessary specifications regarding the production function are assumed. How much new investment do we need in order to have next year's labor productivity be greater than this year's? a. $24,000,000 b. $75,000,000 c. $69,000,000 d. $47,000,000