$4.$ After reading the module on primary sources and secondary sources for this week: $--$ A$)$ Explain why these are primary source documents: Working People's Letters to New Dealers, Huey Long's Speech regarding Share Our Wealth, and Conservative Critics of the New Deal in the $1930$s$.$ Despite their differences, what do they $($and other letters, speeches, autobiographies, laws, court decisions, and interviews, like that of Jose Flores$),$ all have in common which makes them primary source documents in history? $($Basically$,$ give the definition of a primary source document.$)--$ B $)$ Explain why the textbook The American Promise is a secondary source, along with other textbooks, encyclopedias, biographies, and some other sources. Despite their differences, what do they all have in common which makes them secondary sources? $($Basically$,$ give the definition of a secondary source.$)$