Convert the following textual description to an entity-relationship diagram in UML notation. Please spend time differentiating between entities, attributes, relationships and values of attributes. If you are identifying a strong entity - make sure you identify a primary key for it. You are not required to use superclass/subclass hierarchy for any of these problems, but may choose to do so if you wish.

1. A television set has a unique serial number and is associated with a specific manufacturer and a model for that manufacturer. Each television set is associated with exactly 1 manufacturer and 1 model for that manufacturer. A manufacturer has a unique name. A manufacturer can produce 1 to many television models. A model does not have a unique name but is associated with at least 1 manufacturer. An electronic store has a unique name and a unique address that consists of a street number, street address, town, state and zip code. A store stocks 1 to many television sets but a television set can only be found at 1 and only 1 store.

2. A television set has a unique serial number and is associated with a specific manufacturer and a model for that manufacturer. Each television set is associated with exactly 1 manufacturer and 1 model for that manufacturer. A manufacturer has a unique name. A manufacturer can produce 1 to many television models. A model does not have a unique name but is associated with at least 1 manufacturer. An electronic store has a unique name and a unique address that consists of a street number, street address, town, state and zip code. A store stocks 1 to many television sets but a television set can only be found at 1 and only 1 store. A customer consists of a name, and a unique credit card number. A customer buys a television set at a store. A television can be bought by at most one customer but a customer may buy 0 to many television sets.