Policymakers realize that. although education creates a positive benet for those who obtain it, it also creates external benets for the community where the educated individual resides. The graph depicts the marginal social cost (MSC) and the marginal social benet (MSB) associated with education. On the graph, move the point, P. to the point representing the optimal level ofeducation. 10C - Dollars [thousands] 2 4 6 8 '10 12 14 15 13 2D 22 Years at\" schooling What is the socially optimal number of years of schooling for each citizen? What is the socially optimal number of years of schooling for each citizen? Assuming that the marginal social benets of education are completely externalized from the educated individual, how large would a Pigouvian subsidy need to be in order to reach this optimal level of schooling