Suppose that Bob withdraws $100 of cash from his checking account at Security Bank and uses it to buy a camera from Joe, who deposits the $100 in his checking account in Serenity Bank. Assuming a reserve ratio of 10 percent and no initial excess reserves, determine the extent to which (a)

Security Bank must reduce its loans and checkable deposits because of the cash withdrawal,

(b) Serenity Bank can safely increase its loans and checkable deposits because of the cash deposit, and

(c) the entire banking system, including Serenity, can increase loans and checkable deposits because of the cash deposit. Have the cash withdrawal and deposit changed the total money supply?