Here is a bar graph showing performance on both problems

Mean on Problem 1 was 9.6 out of 23 (42%) with a standard deviation of 6.1. Top score was 22 (96%).
Mean on Problem 2 was 2.3 out of 13 (17%) with a standard deviation of 2.2. Top score was 10 (77%).
Mean on combined exam was 11.3 out of 36 (31%) with a standard deviation of 7.9. Top score was 29 (81%).