Total 20 points.

10/20 if 1 of the 3 questions completely correct.

15/20 if 2 of the 3 completely correct.

20/20 if all three correct.


If any of the answers is sort of on the right track, then count 
it as 1/2 credit.  E.g., two sort of on the right track 
answers add up to 1 problem correct, so that would be a 10/20.


One slash through a problem means you got half credit.  Two
slashes (an X) means you got no credit.