right   so if you er draw a make sure you have got at least half a page, right, you are going to be drawing two quite familiar diagrams , right, you er, first of all just draw a normal  total product curve, what we are going to do, because we are looking at a fixed level of output, sorry fixed level of capital  what we are going to be analysing is the relationships between the total product of labour, the average product of labour, and the marginal product of labour, right, for a given level of capital  okay, so the total product curve just tells us what happens to output as we increase the level of our variable factor labour keeping capital fixed at some constant constant level 