Labor required Capital required Method (person-hours) (machine-hours) T-1 200 100 T-2 150 150 T-3 150 130 T-4 100 200 The table below shows four alternative techniques for assembling a car. The cost of labor is $20 per hour, and the cost of capital is $10 per hour. Which of the four techniques for assembling a car is economically efficient? O T- 1 O T-2 O T-3 O T- 4