The following relational model represents a hotel's relational database schema. guest (gid: int, gname: varchar, age: int, city: varchar) soom (rnum: int, rtype: varchar, floor: int) booking (gid:int, rnum:int, day: date) The attributes of relations and constraints are explained as follows: gid: the unique ID of a guest. gname: the name of a guest. gname cannot be null. age: the age of a guest city: the city a guest lives in rnum: the unique number of a room rtype: the type of a room (double, queen, or king). rytpe cannot be null. floor: the floor where a room is located on floor cannot be null. day: the date on which a specific room is booked by a specific guest. The three relations are created with required database constraints as shown below: CREATE TABLE guest ( gid INTEGER, gname VARCHAR(40) NOT NULL, age INTEGER, city VARCHAR(40), PRIMARY KEY (gid) Di CREATE TABLE room rnum INTEGER, rtype VARCHAR(40) NOT NULL, floor INTEGER NOT NULL, PRIMARY KEY (rnum) ); CREATE TABLE booking gid INTEGER, rnum INTEGER, day DATE, PRIMARY KEY (gid, rnum, day), FOREIGN KEY (gid) REFERENCES guest(gid) on delete no action on update cascade, FOREIGN KEY (rnum) REFERENCES room(rnum) on delete no action on update cascade )