Raj has undertaken a seasonal job on Libby's farm. Raj has agreed to pack 100 crates of vegetables in return for the payment of 1,000. Raj and Libby sign an agreement to that effect. Raj packs the 100 crates with vegetables and asks Libby for his payment. Libby then asks Raj to put the crates onto the lorry for delivery. Raj politely states that wasn't their agreement. Libby then tells Raj that his "failure to discharge his agreement means he will not be paid''

(a) Is Libby correct that Raj is not entitled to be paid? Explain your answer.

(b) Would it have made any difference if Raj, as part of his agreement, had to pack the lorry even though he packed 200 crates without asking for extra money for doing so?