a,b,c,d please

3. In recent years, the world (China) has experienced a decrease in economic downturn. To exacerbate this situation, the corona virus plagued China and many other countries, leading to a reduction in their output and income. The combination of economic slowdown and the negative effect of the corona virus have decreased the demand for US exports. Given China's decrease in the demand for US exports and holding everything else constant, use the loanable funds market of the large open economy to determine the net effect on a) (2.5 pts) US national savings, S, b) (2.5 pts) US net foreign investments (NFI) and net exports (NX), c) (2.5 pts) nominal and real exchange rates (Chinese Yuan/US\$), and d) (2.5pts) nominal and real interest rates in the US