A consumer's preferences over pizza (X) and leisure (Le) can be represented by the utility function, U(Le,X)=LaTeX: L_eX^3. The consumer maximizes her utility subject to her full income budget constraint: wT Io = wLe pX where w is her hourly wage, T is total time available, p is the price of X and Io is nonlabor income. Which expression below could represent her labor supply function, La (w, p, Io)