in business Law, please read the 2 separate cases below and answer to the best of your ability the questions in matter. Thank you,

Case 1:

The plumber agreed to install central heating, costing $560. Performance partially defective. The householder discovered the defect, and the plumber refused to fix it. The repair was valued at SR174. So, the defendant refused to pay any of the $560 of the contract. Householder - defective central heating worth $560 - $174 = $386.

Question:

1- Was the contract breached? Explain?

2- Was the plumber entitled to payment? Or is the householder able to get away without paying?

Case 2:

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.

Question:

Can the seller discharge the contract? Explain?