case 1: Sally consults her bank manager, Ms Ting, over her plans to sell her house. Sally is a widow and she frequently consults Ms Ting on financial...

case 1:

Sally consults her bank manager, Ms Ting, over her plans to sell her house. Sally is a widow and she frequently consults Ms Ting on financial and personal matters. When told that Sally intends to sell her house, Ms Ting offers to buy it at the current market price. Sally accepts the offer and the sale is completed. Six months later house prices have risen by 25 percent and it was somehow obvious that house prices were going to rise drastically, Sally is seeking to have the sale of the house set aside, on the grounds that Ms Ting has taken advantage of her position as Sally's bank manager. Advise Sally.  

Case 2:

On 1st January, Tom offered to sell his car to Jack at $8,000. Jack contemplated the value of the car and replied saying "I'll take your car for $7,000". Tom wished to have a few days to consider and hence did not reply. On 4th January, Jack was told by someone that Tom has agreed to sell his car to Peter who was willing to pay $8,000. Not wanting to lose the car, Jack told Tom that he will pay the car for $8,000 and insisted Tom to sell it to him. Will Jack be able to get the car?