Assume that OzStan uses child labour in the production of tennis balls. Given the following labour demand and supply functions

Qd=12-3w

Qs= 3+ w

a) Draw a graph of the labour market of tennis balls

b) At equilibrium Q* w*, are demand and supply price elastic?

c) A new policy is implemented with the aim of reducing child labour wages. What type of policy would be more effective: a demand-side (ban on child labour) or a supply-side policy (providing monetary incentives for parents to keep children at school)? Why? Explain your answer by providing a hypothetical new demand and a hypothetical new supply and calculating the new equilibrium price and quantity traded.