plz answer each in detail

Identify whether the following tests are tests of controls, substantive analytical procedures, tests of details of transactions, or tests of details of account balances For full credit, explain your reasoning for each of your answers: 1) Select a sample of customer receivables and send positive confirmations to each one 2) Examine monthly bank reconciliations for the internal auditors' initials indicating internal verification and review of the reconciliation. 3) Select a sample of entries in sales journal and trace each to the shipping documents 4) Compute receivable turnover and compare with previous years