There is already a file called "BookRecords" in your system $($inside your project folder$)$ which holds the details of

some Books and their Prices and how many copies Sold.

It holds the following details: $($you don't need to write code for writing to the file$)$

In The main method of Testing Class:

Now read the "BookRecords" file to find out:

$($Note: Don't just use your own eyes to read the file.$)$

Print The name of the most popular book in the file and who wrote it$.$

Print how many WriterName $($unique$,$ excluding the duplicates$)$ are there in the file?

Make a Writer class object for WriterName $=$ "Ayon". And print his TotalEarning?

So$,$ What is TotalEarning $=??$

Suppose, for one Writer, his$/$her total number of PublishedBooks $=3.$

$1^{st}$ book price is $=10$ and sold $=5$ copies. So total selling for Book $1=105=50.$

$2^{nd}$ book price is $=5$ and sold $=3$ copies. So total selling for Bookl $=53=15.$

$3^{rd}$ book price is $=100$ and sold $=7$ copies. So total selling for Book $1=1007=700.$

So$,$ for this writer, total selling $=50+15+700=765.$

A writer gets $15\%$ of total selling.

So$,$ that writer's TotalEarning $=15\%$ of $765$