1.the Establishment Clause is a law passed down to protect citizens from a set religion for the country.The lemon test is when the supreme court decides if a religion practice is allowed within the states and it does not cross past the rules.

the burning of the united states flag is protected by the first Amendment because it is consider freeedom of speech or symbolic speech

when someone says they are taking the fifth it means they have decided not to speak on whatever the topic is about