Poe's narrator descends into madness early on in the story and from then on, he experiences psychological turbulence that results in the murder of his wife and his own imprisonment for life.
Using the formula:

Which is, 3.14 x 2^2 (radius is half of diameter)
Which equals 12.56.
Answer:
In the novel Grapes of Wrath, the American Dream has been portrayed as a failed proomise by the author. The characters were able to relate to this failed promise of American Dream when they came to America in search of occupation during the Dust Bowl.
Explanation:
'The Grapes of Wrath' is a novel written by John Steinbeck. The novel narrates the story of Joads and their migration to California in search of work from their homeland Oklahoma during the Dust Bowl.
The author has tried to portray the failure of American Dream in the novel. For most people, American Dream has been a promise of liberty, freedom, and success. But the author depicted the picture of failing of American Dream for thousands of immigrants who came to American cities from Oklahoma, Texas, etc during the period of Dust Bowl.
<u>The characters in the novel were able to relate to this failed promise of American Dream when they arrived in California. The immigrants to California were oppressed by rich landowners and bankers. The dreams of success or work, with which the immigrants came to California was broken when they were charged more for their stay at the farms then they could earn</u>.
In the MLA (Modern Language Association) citation style, the author always comes first:
Malan, Rian
first surname, then name.
then comes the title:
Malan, Rian. My Traitor's Heart
after that it's the publisher and the publication date:
Malan, Rian. My Traitor's Heart, Bodley Head, 1990
and finally the location:
Malan, Rian. My Traitor's Heart, Bodley Head, 1990, London - this is the correct citation according to the MLA style