|Use the following list to answer the following questions:|
1. Improvements in technology
2. Increases in the supply (stock) of capital goods
3. Purchases of rising output.
4. Obtaining the optimal combination of goods, each at least-cost production
5. Increases in the quantity and quality of natural resources
6. Increases in the quantity and quality of human resources
Which set of items in the above list would shift an economy's long-run aggregate supply curve to the right?