The plaintiff agreed to install central heating, costing SR560. Performance is partially defective. The householder discovered the defect, and the plaintiff refused to fix it. The repair was valued at SR174. So, the defendant refused to pay any of the SR560 of the contract. Householder - defective central heating worth SR560 - SR174 = SR386. 

1. Was the contract breached? Explain? 

2. Was the plaintiff entitled to payment? Or is the householder able to get away without paying? 

Case 2: The writer was to write a book on 'Costume and people' for a series, and was to receive SR100 on completion of the book. After he had done the necessary research before the book had been written, the publishers abandoned the series. The writer claimed alternatively on the original contract and on a quantum meruit. Is it right? Discuss ? 

Case 3: A contract was concluded for the sale of rice crops lying in a warehouse. The Government requisitioned the rice crops, in pursuance of wartime emergency regulations for the control of food supplies, before it had been delivered, and also before ownership in the goods had passed to the buyer under the terms of the contract. Can the seller discharge the contract? Explain?