Design E-R diagram for a database of an Airline-System. The database must keep track of Customers and their Reservations, Flights and their status, Seat assignments
on individual flights, and the Schedule and Routing of future flights. Your design
should include primary-key and foreign-key.

Drugs have a high potential for abuse. there is no routine therapeutic use for these drugs and they are not available for regular use. they may be obtained for “investigational use only” by applying to the u.s. drug enforcement agency. examples include heroin and lsd. which scheduled drug is this?