Leno Computers manufactures tablet computers for sale to retailers such as Fallon Electronics. Recently, Leno sold and delivered 200 tablet computers to Fallon for S20,000 on January 5,2017. Fallon has agreed to pay for the 200 tablet computers within 30 days. Fallon has a good credit rating and should have no difficulty in making payment to Leno.

(a) Explain whether a valid contract exists between Leno Computers and Fallon Electronics,

(b) Assuming that Leno Computers has not yet delivered the tablet computers to Fallon Electronics, what might cause a valid contract not to exist between Leno and Fallon?