Помогите, выберите правильный модальный глагол
1) I .. be at every lession
a)are to, b)may, c)must
2)It*s not late, you.. go for a walk
a)have, b)may, c) ought
3)I am able to do it my self, you .. help me
a) neegn*t, b)may, c)are to