Alex signs a contract with Spare Parts. He was the only person signing the contract on behalf of Gold Star. There were no other signatures on behalf of Gold Star. Alex and Oliver sign a SAUD 1.5 million loan contract with Ballarat Bank. Alex and Oliver did not obtain shareholder approval before signing the contract. REQUIRED: (a) Is the contract with Spare Parts a legally enforceable contract? (b) Is the contract with Ballarat Bank a legally enforceable contract? (c) John, a shareholder with 2% of the shareholding, wants to sue all four directors for breaching their directors' duties. John wants your advice about whether the directors breached their duties. (d) John wants to take derivative action to sue the directors. Advise John about the legal requirements of a derivative action and the likelihood of his success