Dear Farah,

 Please consult

https://sites.math.rutgers.edu/~zeilberg/Hist21/mt1S.pdf

for the full solutions.

You got  88  points (out of 120).

Here is what you got wrong:

#3: -10 points

#7: -2 points (EF is a sum of DISTINCT union fractions)

#10: -10 points (not attempted)

#11: -10 points (not attempted)

(P.S. #12: good job)




 Best wishes,

   Dr. Z.