A restaurant owner has the following short-run production function:
Q=30L + 2L² where Q=number of meals served per day, and L=number of workers.
a. Draw a table showing total, marginal and average product up to an input of ten workers, and plot these on a graph.
b. Show the range of labour where stages I, II and III of production occur.
c. If workers can be hired for $40 per day and the average meal is $6, how many workers should be hired?