ช่วยหน่อยคะ อธิบายเศรษฐศาสตร์ข้อนี้ให้ฟังหน่อยคะ

On Average,households in China save 40 percent of their annual income each year whereas households in the United States save less than 5 percent.Production possibilities are growing at roughly 9 percent annually in China and 3.5 percent in the United States.Use graphical analysis of "present goods" vesus "future goods" to explain the differences in growth rates.ขอบคุณมากๆนะคะ