Dear Ashwin,

 You got 85 (out of 100) in the makeup up 

Everything was right EXCEPT
#2: WRONG ANSWER (RIGHT WAY, BUT WAY TOO COMPLICATED,
YOU DID NOT NEED TO USE THE CHAIN RULE)

#3: Wrong Answer and wrong way
 
Since this is higher than 65 (that you got in midterm 1) 
your score is 85

Best wishes
  Dr. Z.