Joe can allocate his time between working and leisure. He earns a wage of $w per hour which he spends on consumption. His utility depends on leisure and consumption. The question asks to: (1) find Joe's optimal choice of work and leisure, (2) show how this changes with a wage cut using indifference curves, and (3) explain the substitution and income effects in terms of elasticities. It also asks to draw Joe's labor supply curve.