Check my answers (Passive Voice)

Here is the original sentences in Active Voice:

1) The doctor prescribes many tablets to the patient.

2) He broke his hand.

3) The students of the medical college study anatomy.

4) I will see the dentist next week.

My answers (sentences in Passive Voice):

1) Many tablets are prescribed to the patient [by a doctor]. (I'm not sure here)

2) His hand was broken.

3) Anatomy is studied by the students of the medical college.

4) I will be seen by the dentist next week. (I'm not sure here)