(10 pts) XXX Inc. produces industrial freezers. The number of freezers that XXX can produce per day, P, depends on the amount of labor utilized, x (in workhours per day) and the expentliture on capital investment, y (in dollars per day) according to the production function P(x,y)=3x3+4x+3x3y+5y3+3y Find the marginal productivity of labor and capital functions and compute marginal productivities of labor and capital if x=40 and y=30 and interpret your results