Experts please give a quick solution
Converts these sentences into passive voice
Dear Student
2. We were kept waiting by her.
3. Air conditioners are used by people to keep them cool in summer.
4. He was found guilty of theft.
5.A holiday was promised to us by the headmaster.
6. Good results were expected by us.
7. Weak must not be mocked.
8. Grapes cannot be gathered from thistles.
9.Your proposal cannot be agreed upon by us.
10.A friend must never be deceived.
11. The fire brigade must be summoned.
12. One's parents should be obeyed.
13.My pocket has been picked.
Regards
2. We were kept waiting by her.
3. Air conditioners are used by people to keep them cool in summer.
4. He was found guilty of theft.
5.A holiday was promised to us by the headmaster.
6. Good results were expected by us.
7. Weak must not be mocked.
8. Grapes cannot be gathered from thistles.
9.Your proposal cannot be agreed upon by us.
10.A friend must never be deceived.
11. The fire brigade must be summoned.
12. One's parents should be obeyed.
13.My pocket has been picked.
Regards