What is the purpose of each of the following control activities?

a. documenting the return of any scrapped products to inventory stores

b. using an MPS to schedule production

c. periodically counting fixed assets and reconciling those counts to the fixed- asset subsidiary ledger

d. using electronic move tickets (implemented with RFID technology) to docu¬ ment transfers of work in process between factory departments

e. prenumbering and periodic accounting of all materials requisitions

f. using passwords to control access to the system that generates production orders g. listing and printing monthly all transactions involving the acquisition or dis¬ posal of fixed assets and having the controller review them