15. What happens to the firm's (employer's) surplus when employees foist upon their employers the payment of employee benets? Does the surplus rise, fall, or remain the same? What about for the cases when b = t? What about when b i t? Explain. 16. Graph the demand and supply curves for (1) the case of b = t = 0 and (2) the case of b = t = 0.25 in the chart drawn below with W on the vertical axis. Label the rst set of curves D1 and S1, and the second set of curves D2 and $2. Show each equilibrium with a dot. Note: In this graph, I put W on the vertical axis, and not W(1+b) or W(1+t) because we can't put multiple things on one axis we can't put W(1+t) and W(1+b) at the same time. We can, though, put W on the vertical axis and show changes in b and t as movements in the curves