1. Consider the following relations for a database that keeps track of automobile sales in a car dealership:

   CAR(Serial_No, Model, Manufacturer, Price) OPTION(Serial_No, Option name, Price) SALE(Salesperson_ID, Serial No, Date, Sale_price) SALESPERSON(Salesperson_ID, Name, Phone)

   Option denotes optional equipment.

   1. (2) For the salesperson Jim, write a relational algebra expression to find the following information for the cars sold: Serial number, Manufacturer, Model, Sales price.

   2. (2) Write a relational algebra expression to find the serial number and model of cars with no options.