can help me with this question please.

Question AB Pte Ltd (AB') is a company that organizes musical concerts for the public It will engage professional musicians to perform in the concerts Below are three scenarios that relate to its business a. It had contracted with musician A to perform at its concert hall However, three days before the concert, a fire destroyed the concert hall. b. Two months after the fire, AB rented a concert hall and contracted with musician B to perform there. However, two days before the function, musician B had a fall and suffered a fracture of the arm As a result he was unable to perform at the concert c. AB had contracted with musician G to perform at a concert However, after the contract had been signed between AB and musician G the fees payable to musician C had been increased by 10%% due to a new government regulation Based on the doclune of frustration in Contract Law, advise AB on the following Explain the doctrine of frustration and provide cases in support Analyze on whether the respective contracts that AB had entered into with the following parties had been frustrated. Musician A b. Musician B e Musician C