I) Substantive Law* defines the rights and obligations of individuals and the state. It establishes the elements of crimes and civil wrongs, and the legal remedies available.

a)

• i) Substantive Law defines the rights and obligations of individuals and the state. It establishes the elements of crimes and civil wrongs, and the legal remedies available.
• ii) Privity of contract is a doctrine that states a contract cannot confer rights or impose obligations upon any person who is not a party to the contract. Only parties to a contract can sue or be sued on it.
• iii) Discharge of contract refers to the termination of contractual obligations. This can occur through performance, agreement, breach, or frustration, releasing the parties from their duties under the contract.

b) Five aspects in which a lawyer is useful in society: * Providing legal advice and counsel to individuals and organizations. * Representing clients in court proceedings and legal disputes. * Drafting and reviewing legal documents, such as contracts and wills. * Facilitating negotiations and alternative dispute resolution. * Upholding the rule of law and ensuring justice is served.