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Fill in the blanks with the options given:
  
Answer variants:
Ethyl alcohol
Functional
\(CH_3(CH_2)_3CH_3\)
Carbon and hydrogen
Suffix
 
1. Hydrocarbons are organic compounds that are made up of ___________ and ___________ atoms.
 
2. A class of organic compounds is a group of compounds that share the same __________ group.