Consider the statement: $$While the central bank can stabilise the economy$$s rate of unemployment at its structural level, it is quite probable that output will not be staying at its potential level, because the actual level of output is affected by various demand$-$side shocks, which have no impact on the labour market$.$ Using the IS$-$LM$-$PC model and the concept of the Phillips curve, explain the intuition behind the concepts: $$structural unemployment$$ and $$potential output$.$ Do you agree with the statement? Why or why not? Use relevant diagrams to illustrate your argument.