Q:Question:(250) ); create table Order_line(agent_id int primary key , address varchar2(200)); create table order_o( order_id int primary key , foreign key (agent_id) references order_line(agent_id), foreign key (customer_id) references customer(customer_id) , day date , quantity number ); create table Payment(payment_id int primary key , foreign key (order_id) references order_o(order_id), foreign key (customer_id) references customer(customer_id) ,A:Answer:See a step by step answer