Answer the question.A new robot could be acquired for $60,000, and be kept for up to 4 years. Its annual expenses would be $6,000, $9,000, $14,000, and $20,000 in years 1 to 4 in the same order. The robot's market value would be $45,000, $33,750, $25,500, and $19,500 at the end of years 1 to 4 in the same order. Determine the economic life of the robot, assuming 10% cost of capital