An economy has the production function Y=0.4(K+N). In the current period, K=100 and N=100. Graph the relationship between output and capital, holding labor constant at its current value. What is the MPK? Graph the relationship between output and labor, holding capital constant at its current value. Find the MPN for an increase of labor from 100 to 110. Compare this result with the MPN for an increase in labor from 200 to 210