1. A hospital wants to have a database to keep track of its patients, doctors, and wards. Construct an E-R
diagram to model the business. Indicate the key for each entity type.
2. A small bank offers two types of accounts to local residents, checking and saving. To keep its transactions
simple, the bank does not allow joint accounts. Please construct an E-R diagram to represent its database design.
Indicate the key for each entity type.