Sasha is in business providing catering for festivals, parties and other functions. She employs Jasper to help her. In May Sasha entered into a contract to provide catering for a festival to be held in July. Under the terms of the contract, Sasha has been paid 10% in advance with the balance payable on the day of the festival. She also entered into contracts to provide catering for a birthday party and a wedding reception, both being held on 12 October. In June, following concerns about security, the festival was cancelled. On the morning of 12 October, Jasper informed Sasha that he was ill and unable to work. Sasha realised that she could only fulfil one of the contracts and decided to provide catering for the wedding rather than the birthday party. Considering what you know about the rules on termination of contracts by frustration and breach, discuss the legal position in connection with Sasha's contracts to provide catering for the festival and the birthday party