1. A laboratory has several chemists who work on one or more projects. Chemists also may use certain kinds of equipment on each project. Attributes of Chemist include Employee_ID (identifier), Name, and Phone- No. Attributes of Project include ProjecUD (identifier) and Start_Date. Attributes of Equipment include Serial_No and Cost. The organization wishes to record Assign_Date-that is, the date when a given equipment item was assigned to a particular chemist working on a specified project. A chemist must be assigned to at least one project and one equipment item. A given equipment item need not be assigned, and a given project need not be assigned either a chemist or an equipment item.2. A college course may have one or more scheduled sections, or may not have a scheduled section. Attributes of Course include Course_ID, Course_Name, and Units. Attributes of Section include Section_Number and Semester_ID. Semester_ID is composed of two parts: Semester, and Year. Section_Number is an integer (such as "1" or "2") that distinguishes one section from another for the same course but does not uniquely identify a section. How did you model section? Why did you choose this way versus alternative ways to model section?