4. The lecturer said, Dont use your notes at the exama)

4. The lecturer said, Dont use your notes at the exam
a) The lecturer told the students do not use your notes.
b) The lecturer said to the students to use their notes.
c) The lecturer told the students not to use their notes.
5. The doctor said, You must follow my prescriptions
a) The doctor said you must follow my prescriptions.
b) The doctor said he had to follow my prescriptions.
с) The doctor said I had to follow his prescriptions.