Consider the following relation : CAR_SALE (Car#, Date_sold, Salesman#, Commission%, Discount_amt). Assume that a car may be sold by multiple salesmen and hence {CAR#, SALESHMAN#} is the primary key. Additional dependencies are : Date_sold-> Discount_amt and Salesman#-> Commission% Based on the given primary key, is this relation in 1NF, 2NF, or 3NF? Why or why not? How would you successively normalize it completely?