Нужно поставить предложение в вопросительную и отрицательную форму Every boy and every girl in Russia must go to school, that is, they must get a full secondary education.

Must every boy and every girl in Russia  go to school, that is, they must get a full secondary education?

Every boy and every girl in Russia mustn't  go to school, that is, they must get a full secondary education.