This is a business law question PLEASE I really need HELP !!! PLEASE answer ALL questions!!!! THANK YOU.

Gal promised to sell Ariana her diamond necklace and Araina promised to pay $2,000 to Gal. What type of contract is this? O A bilateral contract O A unilateral contract O A liquidated contract O An executed contract O A quasi-contract If Chris promises Katherine that he will stop smoking for two (2) years if Katherine promises to pay him $5,000, Chris's promise is considered O promissory estoppel O past consideration O an illusory promise O a preexisting duty O forbearance Jon promises Pedra that if she will come to the high school prom with him, he will think about paying for her prom dress and shoes. This is an example of O valid consideration O a unilateral contract O a quasi-contract O an illusory promise O past consideration