Dear Jiahe,

Your score in Exam 2 is 90 out of 100

Everything was right except

#1: wrong ans., right (but too compliated way). Also you did not explain
how you got your wrong answer (Maple, where you mistyped?): -3 points

#9: DOWNWARD direction (you forgot to multiply by -1): -3 points

#10: I asked for The POINT, not the value: -4 points