In your words, briefly describe the differences (and any similarities) involved in the following contracts. Topics to cover: Bilateral v. unilateral, written v. oral, terms, consideration, performance, breach, damages, remedies, etc.:

1. a numbered ticket provided by a valet parking attendant or dispensed by an automated machine at the entrance to a parking structure
2. a boilerplate agreement provided by a cellular provider to subscribers or by a bank to credit card account holders
3. the oral exchange at a restaurant when a waiter takes your order for dinner
4. a formal contract such as a lease agreement for office space

Do not forget to include outside material that supports your thoughts, while remembering to properly cite and reference any material used.