I need help with this question.

Suppose the supply of union representation is RS=2.1 p and the demand for union representation is given by RD=249-3.9p. If union fees are above $ |:| , zero workers would want to join. If union membership is free, the maximum number of workers who would want a union is |:| . In equilibrium, the fee for being represented by a union will be $ |:| per member and |:| workers will choose to be represented by a union. If the government introduces right-to work laws we expect that the size of the union will |:| as a result of right-to work laws (Enter 1 for increase, 0 for stay the same, -1 for decrease)