Indicate (Yes or No) whether each of the following is properly included in Cash and Cash Equivalents.
_______ 1. $ 10,000 of government Treasury bills purchased 10 days prior to their maturity.
_______ 2. $ 50,000 of government Treasury bills purchased to satisfy a legal requirement to set aside funds for a landfill cleanup.
_______ 3. $ 10,000 of cash owed by customers on sales made within 20 days of year- end.
_______ 4. $ 1,000 of cash in the petty cash custodian's locked cash box.