Shellys preferences for consumption and leisure can be expressed as U(C, L) = (C − 200)(L − 80) (1) This utility function implies that Shellys marginal utility of leisure is C − 200 and her marginal utility of consumption is L − 80. There are 168 hours in the week available to split between work and leisure. Shelly earns $5 per hour after taxes. She also receives $320 worth of welfare benefits each week regardless of how much she works. 5.1 Graph Shellys budget line. 5.2 Write down the budget equation. 5.3 Find Shellys optimal amount of consumption and leisure. 5.4 What is Shellys marginal rate of substitution? 5.5 What is Shellys reservation wage?