I have to provide a theoretical Analysis of the theory of production by using the law of diminishing marginal returns, defining what production

I have to provide a theoretical Analysis of the theory of production by using the law of diminishing marginal returns, defining what production function is, 3 stages of production, defining MPL, APL and their relation to the TP curve. I need to do this in a short essay format and with the use of a TP, APL and MPL chart.