Dear friends,
I have a training of 10 questions of PS for beginners. I’ve managed to solve 6 out of 10 but the following questions I couldn’t figure out, can anyone help?
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Create a function to check an account number (VISA)

Create a function to calculate your age in seconds, minutes and hours.

Unpack the library.zip file on the commandline. This is a folder containing data from a large collection of ebooks. There is also a CSV file (comma seperated values) with an overview. Open it on the commandline:

Try to make the following exercises based on the folder or on the CSVfile:
 Count all the books in this collection.
 Select all JK Rowling's books
 Select all books of a given author, write this overview to a text file.
 Authors are written in different ways. Add all JK Rowling's folders together.
 Find the largest and smallest cover image
 Select the five most occurring authors.
 Give the average number of books per author.
 Find all the youth books.
 Find the book that is about special gifts and open its cover.
 Give the number of books per publisher
 Give the average number of books per publisher
 Move all books from an ingiven author to a new folder
 Give all books where a given word appears in the title.
 Train yourself with this collection…
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Any help would be appreciated,
Thank you