For each test of transactions and each test of account balances for investments listed below, identify the assertion for which the test provides evidence. 1. Determine whether there has been any permanent impairment in the value of the cost basis of an individual security. 2. Inspect securities if they are maintained by the client or obtain a confirmation from an independent custodian. 3. Search for purchases of securities by examining transactions for a few days after year-end. 4. Examine brokers' advices for a sample of securities purchased during the year.