Final answer:
An increased savings rate in the Solow model leads to immediate decrease in consumption and increase in output, and eventually results in higher levels of both consumption and output at the new steady state.
Step-by-step explanation:
The immediate effect of an increase in the savings rate within the context of the Solow (classical) growth model is that: (b) consumption decreases and output increases. This happens because more resources are diverted from consumption to investment, leading to increased capital accumulation and thus higher future output.
Relative to the original steady state, the new steady state, caused by an increased savings rate that is still below the golden rule level of savings, would result in: (a) the level of consumption increases in the long run as the economy grows due to higher levels of investment, and output increases. Eventually, the economy reaches a new steady state with a higher stock of capital which leads to higher output and consumption.