TVC (tvc) Curve, Diminishing Returns, Returns to Scale

I would really appreciate it if you could explain the answer with only a graph. Thank you.

a) Can you graph a typical TVC curve and explain how it reflects diminishing returns?

b) Can you explain the difference between the diminishing returns and returns to scale. How does each affect the behaviour of average cost?

Solution Summary

TVC (tvc) Curve, Diminishing Returns, Returns to Scale are emphasized.