Suggest the economic terms for the given statements.
1. Animal money : Oldest form of money : : __________ : Latest form of money.
2. Currency notes : Unlimited legal tender : : Token coins : __________
3. U.K. : Pound : : __________ : Yen
4. Credit Cards : Plastic Money : : Digital Wallet :__________
5. ₹ 1 note : __________ : : ₹ 100 note : Reserve Bank of India.