18. Dr. J has 80 hours per week to divide between work and leisure. His wage rate if $5 per hour. Dr. J receives a lump sum payment of $150 per week. Suppose that the rst $100 per week of his labor income is untaxed, but all labor income above $100 is taxed at a rate of 70%. Dr. J's budget line has no kinks in the part of it that corresponds to a positive labor supply. The slope of Dr. J's budget line is everywhere 1.50. Dr. J's budget line has a kink in it at the point where he takes 70 units of leisure. Dr. J's budget line has a kink where his income is $250 and his leisure is 60 hours. Dr. J' s budget line has a piece that is a horizontal straight line. 9999