I'm confused on the difference between stong and weak internal control. please help

Indicate whether each procedure is an example of a strong internal control or a weak internal control. a. Cashiers accept cash from customers and use a cash register. b. At the end of the day, the cashiers put the cash in the safe and record a journal entry in the accounting information system. C. On a monthly basis, Gary takes the cash from the safe and deposits the cash in the bank. Weak internal control Strong internal control Weak internal control