The first set of exercises are all for different areas of the delts. The only direct traps exercise is barbell shrugs.

Anthony is right. Shoulder press- Delts, supraspinatus Upright row- Delts, supraspinatus, traps ( should be mostly shoulder though) Lateral raise-medial delt, supraspinatus Front rasie- anterior delt rear lateral raise- posterior delt, rhomboids, traps (should be mostly felt in post delt)

The first muscle listed per exercise is the main one worked. If you are feeling it the other groups more focus on your form to engage the appropriate muscle group.