i need to answer these essay topic questions.. any help is greatly appreciated

1. 2. Describe the beginning and conclusion of World War II. What lead to the entrance of the United States into World War II? Was the nation prepared for war? Why did President Truman decide to drop the atomic bomb on the cities of Hiroshima and Nagasaki? What past events during the war and future concerns lead to Trumanís decision to drop the bomb? What would you have done? Why?

2.Describe the causes and effects of the Great Depression. What led to the collapse? What policies pulled the United States out of the Depression? What impact did the Depression have on the people, both at the time and afterwards?