How would each of the following affect Helena Hand basket's supply of labour?
a. The value of Helena's home triples in an unexpectedly hot real estate market.
b. Originally an unskilled worker, Helena acquires skills that give her access to a higher-paying job. Assume that her preferences about leisure are not affected by the change in jobs.
c. A temporary income tax surcharge raises the percentage of her income that she must pay in taxes, for the current year only. (Taxes are proportional to income in Helena's country.)