Concepts:

• balance - a customer's account balance
• registerDate - the date of registering the client as a customer
• profile - one of the possible customer status
• product - products/services offered by the bank
• comment - comment on customer service package

Relations:

• balance → profile
• registerDate → profile
• profile → profile
• profile → product
• product → product
• profile → comment
• product → comment (look 2 observations)