1. (50 points) Design an ER diagram describing the following database. You are asked to adopt the Chen notation style (https://www.lucidchart.com/pages/er-diagrams?a=1) introduced in class. A PERSON has attributes pid (key) and name. A SKIER is a type of PERSON with attribute aptitude. A SNOWBOARDER is a type of SKIER. A PARofSKIS has attributes sid (key) and model A SNOWBOARD has attribute sid (key) and model. A SKIER OWNS zero or more PAIRofSKIS. The ownership relation has a purchase_price. A PAIRofSKIS is owned by at most one SKIER. A SNOWBOARDER OWNS zero or more SNOWBOARD. A person cannot rent more than one PAIRofSKIS or one SNOWBOARD at the same time. A person cannot rent a A piece of equipment can be rented by at most one person at a time. The rental comes with a start_date and an end_date. PAIRofSKIS and a SNOWBOARD at the same time either