real state questions(Canada)

2.

a. What is the purpose of making a requisition.

b. The buyer's lawyer has just obtained the tax certificate and it discloses arrears of taxes What should the lawyer do?

3.

a. What requisition should be made if there are mortgages on a title other than any mortgages to be assumed?

b. How is the buyer protected against potential title problems in a transaction b. where title insurance is purchased?