Any help with answering this question is greately appreciated, these questions are from Accounting information system course;

For all of the following seven situations, identify one or more control procedures (either general or application controls, or both) that would guard against each of the following errors or problems.

a. A bank deposit transaction was accidentally coded with a withdrawal code.

b. The key-entry operator keyed in the purchase order number as a nine-digit number instead of an eight-digit number.

c. The date of a customer payment was keyed 2001 instead of 2015

d. A company employee was issued a check in the amount of $135.65 because he had not worked a certain week, but most of his payroll deductions were automatic each week.

e. A patient filled out her medical insurance number as 123465 instead of 123456.

f. An applicant for the company stock option plan filled out her employee number as 84-7634-21.The first two digits are a department code. There is no department 84.

g. A high school student was able to log onto the telephone companys computer as soon as he learned what telephone number to call.