Contract law is based, among other things, on concepts such as "meeting of the minds" and "freedom of contract". Along these lines, contract law does not require consideration to be "adequate"?

a) Using your own words, explain why consideration need not be commercially adequate.

b) Explain why, in spite of these concepts, parties to an employment contract cannot agree on payments that are below minimum wages.

c) Explain why, in spite of these concepts, the Equal Pay Act 1972 makes it illegal to contractually and voluntarily agree on different remuneration rates for male and female workers (that are similarly situated).