$.$ Explain what is meant by a specialization relationship. i$)$ Illustrate specialisation in the following scenario: ABC bank wants to keep informa on on their customers and the accounts that they hold at the bank. A customer may hold several accounts whilst there may be accounts that are jointly held. All accounts have an account number and a balance however there are savings accounts that will have a interest rate and current accounts that have overdra limits$.$ a$)$ Identify whether the disjoint or overlap rule applies b$)$ Identify whether the total specialization or partial specialization rule applies