f the Fed wishes to increase the money supply, it can: Multiple Choice sell a bond to bank, and take the money it receives in exchange out of circulation in the economy. buy bonds from a bank, giving the bank cash in return, which it can then lend out. sell a bond to a bank, and take the money it receives and lend it out to someone else. buy a bond from a bank, requiring the bank to hold the money it receives as excess reserves.

Asupermarket has been experiencing long lines during peak periods of the day. the problem is noticeably worse on certain days of the week, and the peak periods are sometimes different according to the day of the week. there are usually enough workers on the job to open all cash registers. the problem is knowing when to call some of the workers stocking shelves up to the front to work the checkout counters. how might decision models the supermarket? what data would be needed to develop these models?