I need some help with my law questions.
Question 1:

Adam Jr. tells his 19 years old son Adam Jr. that he will give hem
$2000 if he does not smoke pot while he is in college. If Jr smokes no
pot in college can Jr. enforce the promise against his father?
1- No, because he had a pre-existing duty to refrain from doing an illegal act
2- no, because it was a promise based on a moral obligation
3- no, because it was an illusory promise
4- yes, jr. suffered a legal detriment by giving up his freedom to do as he chose
5- Yes, as jr. relied on the promise and has fully performed his side of it


Question 2 :


If you sat down at a coffee shop counter. while you were reading a
newspaper, the waitress poured coffee in the empty cup in front of
her. no words were spoken. you drank the coffee and then started to
leave the restaurant without paying for it. What is the best legal
argument for the restaurant?
1- this was an implied-in-fact contract
2- this was an implied-in-law contract

The questions are contract law 101 not 2nd year buiness law 
if you are having a problem answering this question how are you going
to pass the bar

I am not a law student. Just have a law class as a requirement.
But thanks for your comment.

Ok if not law but undergrad student
try as stated in my above comment you will find these issues in first
year contract law 101

as to question 1, trying to think back to my 101 days look to 1& 2
answers as correct but its just not about getting the right answer but
how the process you arrive at the answer

question to would be no different if you pulled up to gas station full
service say nothing they pump gas and  leave

For the question one answer #1 is correct. For question 2, answer # 1
is correct also. Just refreshing your memory.