what is the solution?

for the following internal control procedures, give the reason or object of the control:

checks are mailed by someone other than the person who prepares and signs a check.

the accounting department matches invoices received to receiving reports prior to recording the payable.

the cashier deposits cash and mails checks to vendors, but does not record any information in the accounting system.

the employee performing the bank reconciliation does not perform any cash handling or recording activities.

the stock of unused checks is kept under lock and key

surprise counts of cash funds are conducted periodically.

all purchases must be made by the purchasing department

the accounting department matches invoices to copies of purchase orders.

please answer