Challenge #1

Create a function named add_book that adds books to a library catalog represented as a dictionary. The function should take the title (the key), author, and publication year as input parameters and add a new book entry to the catalog with initial availability marked as "available."

Your function signature should look like this:

def add_book(catalog, title, author, year):
    # Your code here

• catalog is the library catalog dictionary.
• title is the title of the book.
• author is the author of the book.
• year is the publication year of the book.

Your function should add a new book entry to the catalog with the specified details, like this:

add_book(catalog, "The Great Gatsby", "F. Scott Fitzgerald", 1925)
add_book(catalog, "To Kill a Mockingbird", "Harper Lee", 1960)

After running the function with these examples, the catalog dictionary should include these two books with their details and an initial availability status.