The company keeps records of its customers’ ssn (Z) with their telephone numbers (F), names (?, yourinitial goes here), addresses (X) and a PIN number (Q). Each of those customers has only one account number (N) associated to a usage balance (IN). Account numbers(N)andphone numbers (F)may be associated to more than one customer (usually because those customers are related and may live in the same house). These peopleare not differentiated in the system(no primary or responsible customer).Therefore, all are considered regular customers. The entire set of information can be represented as ZF?XQNU.