某商业集团的销售管理中，商店信息包括：商店编号、商店名、地址；商品信息包括：商品号、商品名、规格、单价；职工信息包括：职工编号、姓名、性别、业绩。商店与商品间存在“销售”联系，每个商店可销售多种商品，每种商品也可放在多个商店销售，每个商店销售一种商品，有月销售量；商店与职工间存在着“聘用”联系，每个商店有许多职工，每个职工只能在一个商店工作，商店聘用职工有聘期和月薪。
（1）请画出E-R图，并在图上注明属性、联系的类型。
（2）将E-R图转换成关系模式，注意关系模式中存在主码和外码的需标明。
正确答案及解析
正确答案
解析
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