The ridge lines indicate boundaries of economic relevance. Which of the following is true regarding the significance of the ridge lines?
1
They represent the region where any combination of inputs yields increasing marginal returns.
2
Any input combination beyond the ridge lines results in negative marginal productivity for both inputs.
3
The ridge lines intersect at the point of producer equilibrium, ensuring cost minimization.
4
The region between the ridge lines represents points where both inputs have increasing returns to scale.
5
Question Not Attempted