Can someone please help me with this.

3) 1/4

4) dawn to dark (it's from dawn to dark if it's "dawn to dark, from")

24.9% of people were unemployed

Explanation:

"Employment dropped by 20.5 million, more than 10 times the previous largest monthly decrease of 1.96 million experienced in September 1945 after World War II ended. At that point in time this was about 3.3% of the workforce."

to reform the distraught soviet union, the democratization of the communist party was promoted through party secretary mikhail gorbachev's policies of “perestroika” and “glasnost.” perestroika refers to the reconstruction of the political and economic system established by the communist party.