Bradley Cooper is the audit senior of the accounting firm Silver Lining Accountants. He is currently involved with the audit of Australia Manufacturing Limited. He has performed each of the following procedures in order to gather audit evidence: (a) Checked the last purchases transaction recorded before the balance sheet and the first purchases transaction recorded after the balance sheet date. (3 marks) (b) Vouched a sample of inventory items from a client's inventory records. (3 marks) (c) Inventories are checked to exclude items billed to customers or owned by others. (3 marks) (d) Examined an analysis of receivables turnover, comparing current period with that of the previous period. (3 marks) (e) Slow-moving and obsolete items included in inventories are properly identified. (3 marks) Identify the key assertion that Bradley is most likely testing with each of the above procedures and provide an explanation for your answer.