Create an ER diagram (using ERDPlus) for the Qwerty Bus Company based on the following requirements.

Show entities, relationships, and attributes. Qwerty Bus Co. is a bus charter company keeps track of: For each employed driver: fullname (composed of fname and lname), birthdate, age, unique SSN, unique dln (drivers license number). For each bus owned: unique blpn (bus license plate number), make, model, year, no_of_seats. For each charter assignment: unique caid (charter assignment id), datebegin, timebegin, dateend, timeend, startlocation, endlocation. Additional requirements: Each driver can be assigned to a number of charter assignments but does not have to be assigned to any. Each bus can be assigned to a number of charter assignments but does not have to be assigned to any. Each charter assignment must have one driver and one bus assigned to it. Each driver is certified to drive one or more buses. Each bus must have at least one driver certified for it.