Please he me! ;w; A private book collector is designing a database to keep track of her purchases and book holdings. Consider the entity set book with attributes title, author, publisher, pubdate, numberpages, condition, cost, and datepurchased. a. Show how the entity set and its attributes would be represented on an E-R diagram. b. Describe the domain of the cost, attribute, making assumptions as needed. c. Identify a superkey for the book entity set. d. Identify all candidate keys for the entity set. e. Identify a primary key for the entity set and underline it on the E-R diagram.