Information provided by the grader:

The grading scheme for HW 4 is posted below:
1.9.36 - (1), 1.9.38 - (3),
2.1.2 - (2), 2.1.12 - (2), 2.1.22 - (2),
2.2.3 - (2), 2.2.6 - (1), 2.2.20 - (2), 2.2.32 - (3), 2.2.38 - (2)