Suppose new advanced farming equipment is developed. These new farming machines are substitutes for low-income workers such as farm laborers, but they are complements to high-income workers such as farming equipment operators and technicians. Which of the following is true? Nhm la chn cu tr li The demand curve for low-income workers shifts to the left while the demand curve for high-income workers shifts to the left. The demand curve for low-income workers shifts to the right while the demand curve for high-income workers shifts to the right. The demand curve for low-income workers shifts to the left while the demand curve for high-income workers shifts to the right. The demand curve for low-income workers shifts to the right while the demand curve for high-income workers shifts to the left