I'm unsure of how to solve this. This is what I got so far:

Q = K^1/2(10 x L² - L³)

Q/L = 2(10L² - L³)/L

dQ/dL = 40L - 3L² = 0

20L - L²

1.-Producing corn requires land, K and labor, L. K acres of land and L year-person labor result in the harvesting of K500 x l.2 L3) tons of corn. Suppose K = 4. Obtain the average and marginal products of labor for this technology. Represent these two functions in the same graph, carefully marking (only) the important points (maxima, intercepts,...)