Draw a class diagram, showing the relevant classes, attributes, operations, and relationships for each of the following situations.

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 name and phone No$.$ Attributes of Project include project Name and startDate. Attributes of Equipment include serial No and cost. The organization wishes to record assign Date$$that is$,$ the date when a given equipment item was assigned to a particular chemist working on a specified project$$as well as total Hours, that is$,$ the total number of hours the chemist has used the equipment for the project. The organization also wants to track the usage of each type of equipment by a chemist. It does so by computing the average number of hours the chemist has used that equipment on all assigned projects. 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.