What were the olmec people known for?

The Olmec people were known for being the first major civilization in Mesoamerica. They were also known for carving these huge stone heads. They heavily influenced the later cultures such as the Aztecs and Mayans.

both are true, the congress does have the power to create banks, even if this power is not specifically described in the constitution, since there is nothing restricting it and there is power given to the congress to make "all laws which shall be necessary and proper". maryland was not allowed to tax a branch of the national bank operating there, and the supreme court decided that no state could. both of these topics were discussed in a decision of the mcculloch v. maryland case in 1819.