Consider the following database schema and then select the statement that is most correct:

Customer $\{$C$\_$ID#$,$ C$\_$Name, C$\_$Surname, C$\_$Address $\}$

Order $\{$Order$\_$No#$,$ Item, Price, Qty$,$ Del$\_$Date, C ID$\}$

a$.$ Order is an object of the class Customer.

b$.$ There is a multiplicity of $1$:M between the Customer and Order entities.

c$.$ Order number is a foreign key.

d$.$ There is a multiplicity of $M$:$N$ between the Customer and Order entities.

Which of the following will be illustrated in a Use Case diagram:

a$.$ System shall be able to process a notification in $1$ second or less, and up to and including $500$ notifications in $15$ seconds or less.

b$.$ Passwords shall never be viewable at the point of entry, or any other time.

c$.$ The system shall display the number of items currently in the shopping basket, on each page of the online catalogue.

d$.$ The Online Payment System shall be available for use between $10$:$00$ a$.$m$.$ and $11$:$00$ p$.$m$.$

Consider the diagram below then select the statement that is most correct about the diagram:

a$.$ There is a composition relationship between the Vehicle class and the Driver class.

b$.$ A Driver is dependent on a vehicle.

c$.$ A Driver is a part of the Vehicle and is not dependent on the existence of the vehicle $($can exist without the whole$).$

d$.$ The Engine is a kind of Vehicle.