I need help with some practice multiple choice. Here are three questions I need help with.

1. Contingent fees are permitted in criminal defense matters: a. If the fee agreement is not unconscionable. b. In every instance. c. If the criminal defendant is not represented by a public defender. d. In no instance
2. If a California lawyer becomes aware that a client is threatening to commit a criminal act reasonable likely to result in death or bodily harm, they: a. Must withhold that information because of California's strict confidentiality statute. b. May but are not required to disclose confidential information c. Must take every step to prevent the client from committing the crime. d. Can only take action if the client is located in a jurisdiction that follows the ABA Model Rules.
3. If a lawyer is approached a new client who interests are adverse to a former client: a. They may never represent the new client. b. They may represent the new client only if the new matter is not substantially related to the old matter. c. They may represent the new client even if the matter is substantially related to the old matter with informed written consent of both clients. d. They must refer the matter to another lawyer that they know to be competent.