In some labor markets, the supply of labor is as follows (where W represents wages and L represents the number of employees): W = 120 + 0.22L However, the demand for labor is: W = 990 -0.21L a) At what salary and number of employees is equilibrium in this labor market? b) If, however, the salary is different from the equilibrium salary of -10.7% (a minus number on the percentage means a decrease, a positive number means an increase), how much unemployment or excess demand in the number of people will be considered in the market?