please answer this question.

A production function exhibits constant returns to scale if a twofold (threefold, etc.) increase in all inputs leads to a twofold (threefold, etc.) increase in output. For example, by doubling the use of capital and labor, the firm would double its output. a. What would the average and marginal cost curves look like under constant returns to scale? Please carefully draw an example of this (use most of the width of a page). Please make a large graph, taking up most of the width of your paper. Please carefully use a straight edge to draw all your lines and annotate all lines and other relevant elements. b. Give an example of a production function that exhibits constant returns to scale