In The main method of Testing Class:

Now read the "BookRecords" file to find out:

$($

ote: 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

$1$

$$I$.$

$($

$3$

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Print how many WriterName

$($

unique

$,$

$$excluding the duplicates

$)$

$$are there in the file?.....................

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$.$

Make a Writer class object for WriterName

$=$

$"$Ayon$".$ And print his TotalEaming?.................

$($

$8$

$.$

$)$

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

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

$1$s book price is$-=10$ and sold $5$ copies. So total selling for Book$1=10$x$5=50$

$2$ad book price is $5$ and sold$=3$ copies. So total selling for Book$1=5$x$3=15.$

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

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

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

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