Dear Karan,

 Please consult

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

for the full solutions.

You got 100 points (out of 120).

Here is what you got wrong:

#3: -7 points (You had to do it from scratch)

#4  (i): -3 points: logic is garbled

    (ii): -2 points: logic is garbled

#12: -8 points (you did it not the requested way)




 Best wishes,

   Dr. Z.