Given the short-run production function: Q=120L²-L³, where Q is Total Product and L is labour input, (a) Find MP and AP of labour (b) Find the value of L that maximizes Total Product (e) Find the value of L that maximizes Marginal Product (d) Find the value of L that maximizes Average Product (e) CAREFULLY graph TP, MP, AP and label all the critical points you found in parts b-d.