1. Determine the returns to scale of the following production function: Y = 3K2 + 213 (a) constant (b) increasing (c) decreasing (d) indeterminate 2. Determine the returns to scale of the following production function: Y = 5403 + 320.3 (a) constant (b) increasing (c) decreasing (d) indeterminate 3. Assume an economy has the Cobb-Douglas production function Y = 10K-1/3 [2/3. If the economy's stock of capital doubles, the share of total income paid to the owners of capital will (a) increase by 10 percent. (b) increase by one-third. (c) increase by two-thirds. (d) stay the same