Having just received her tax return, Amanda wants to buy a car. She knows that her friend Maggie wants to sell her old Corolla to buy a Ford Falcon. On Saturday, Amanda goes to Maggie's house and offers her to buy her Corolla for the amount of $ 5,500. Maggie is not sure whether to accept Amanda's offer and she promises Amanda to give an answer the following morning. Before reaching a decision about her old Corolla, Maggie visits the Ford dealer to ask about the Falcon model that she wants to buy. A Ford representative told Maggie that her Corolla's worth was $6,000 and the dealer was ready to accept her old car as down payment for a brand new Falcon. After her meeting with the Ford representative, Maggie called Amanda and told her she was ready to sell her Corolla for the amount of $6,300. Amanda replied that she would pay $6,200 and she would collect the car the following day. 1) When Amanda arrived at Maggie's house the following day to collect the car, she found that Maggie had sold it to the Ford dealer for the amount of $ 6,300. Amanda is upset and she comes to you wanting to know whether she had previously formed a contract with Maggie. 2) Imagine that there was a sale of old Corolla car contract between Amanda and Maggie. Maggie actually had two old Corolla cars - a red one and a blue one. Amanda only knew about the red one and the car she wanted was also the red one. However, Maggie did not want to sell her red car and she thought that Amanda wanted to purchase the blue one. When Amanda arrived at Maggie's house to collect the car, she requested to drive the red car away, but Maggie did not allow her to. Amanda is upset and she comes to you wanting to know whether she could drive the red car away based on their contract.decsribe briefly